200+ Most Difficult Words with Meanings in English Vocabulary

Have you watched Mary Poppins movie? Then, you certainly remember this word: Supercalifragilisticexpialidocious. Try pronouncing it on your first attempt! A little tongue-twisting and tricky, right! The English language is a vast treasure trove of words, each with its own unique charm and significance. While many words roll off the tongue effortlessly, there are some that pose a challenge even to the most seasoned wordsmiths. In this blog, we’ll dive into the world of difficult words, uncovering their meanings, and exploring a range of intriguing vocabulary starting from ‘A’ to ‘Z.’

What Are Difficult Words?

Difficult words are those that might leave us scratching our heads when we encounter them. They often boast complex spellings, tricky pronunciations, or meanings that are not immediately evident. However, understanding and incorporating such words into our vocabulary can enhance our language skills and communication.

Difficult Words in English Vocabulary Starting with the Letters ‘A’ to ‘Z’

Are you a student striving to improve your English vocabulary? Don’t worry! Here we are with this article to help you enhance your grip on the English language. This will act as a guide to learn new English words, and difficult English words that you can use in your daily conversations and communications. Continue reading below.

List of Difficult English Words to Pronounce

Here’s a list of difficult words in English from A to Z, along with their meanings:

A – Aberration: A departure from what is normal or expected, typically an unwelcome one.

B – Bombastic: High-sounding but with little meaning; inflated.

C – Cacophony: A harsh, discordant mixture of sounds.

D – Defenestration: The act of throwing someone out of a window.

E – Epistemology: The study of the nature and scope of knowledge.

F – Facetious: Treating serious issues with inappropriate humor.

G – Gobbledygook: Language that is meaningless or hard to understand; jargon.

H – Hapax Legomenon: A word that occurs only once in a language’s written record.

I – Ineffable: Too great or extreme to be expressed or described in words.

J – Jeremiad: A long, mournful complaint or lamentation; a list of woes.

K – Kaleidoscope: A constantly changing pattern or sequence of elements.

L – Lethologica: The inability to remember a word or the name for something.

M – Mellifluous: (of a sound) Sweet or musical; pleasant to hear.

N – Nefarious: Having a harmful effect, especially in a gradual or subtle way.

O – Obfuscate: Render obscure, unclear, or unintelligible.

P – Pernicious: Having a harmful effect, especially in a gradual or subtle way.

Q – Quixotic: Exceedingly idealistic; unrealistic and impractical.

R – Recumbentibus: A witty comeback you think of too late.

S – Sesquipedalian: (of a word) Polysyllabic; long-winded.

T – Tenebrous: Dark, shadowy, or obscure.

U – Ultracrepidarian: Someone who gives opinions on subjects they know nothing about.

V – Verisimilitude: The appearance of being true or real.

W – Weltanschauung: A particular philosophy or view of life; the worldview of an individual or group.

X – Xenophobe: A person who is fearful or contemptuous of that which is foreign, especially of strangers or foreign cultures.

Y – Yokel: An unsophisticated person from the countryside; a bumpkin.

Z – Zugzwang: A situation in which someone is compelled to make a decision, but any available options will result in a disadvantage.

Difficult Words in English Vocabulary Starting with the Letter ‘A’

Here’s a list of difficult words in English vocabulary starting with the letter ‘A,’ along with their meanings:

Word	Meaning
Aberration	A departure from what is normal or expected, typically an unwelcome one.
Aplomb	Self-confidence or assurance, especially when in a demanding situation.
Arcane	Understood by few; mysterious or secret.
Amalgamate	To combine or unite to form a single organization or structure.
Anathema	Something or someone that is intensely disliked or cursed.
Aplenty	In abundance or plenty; more than enough.
Avarice	Extreme greed for wealth or material gain.
Alacrity	Brisk and cheerful readiness; eagerness.
Acerbic	Sharp and forthright, often in a sarcastic or critical manner.
Apotheosis	The highest point in the development of something; the culmination or climax.

Difficult Words in English Vocabulary Starting with the Letter ‘B’

Here’s a list of difficult words in English vocabulary starting with the letter ‘B,’ along with their meanings:

Word	Meaning
Bombastic	High-sounding but with little meaning; inflated.
Belligerent	Hostile and aggressive.
Bifurcate	To divide into two branches or parts.
Bellicose	Demonstrating a willingness to fight; warlike.
Baleful	Threatening harm or evil; ominous.
Banal	Lacking originality; trite; cliché.
Brobdingnagian	Enormous or gigantic in size.
Byzantine	Complicated, intricate, and difficult to understand.
Bathos	An abrupt and often ludicrous transition in style from the exalted to the commonplace.
Bellicosity	A disposition towards aggression and warlike behavior.

Difficult Words in English Vocabulary Starting with the Letter ‘C’

Here’s a list of difficult words in English vocabulary starting with the letter ‘C,’ along with their meanings:

Word	Meaning
Cacophony	A harsh, discordant mixture of sounds.
Capitulate	To surrender or give in to an opponent.
Circumlocution	The use of unnecessarily long or indirect words.
Clandestine	Kept secret or done secretly, often for illicit purposes.
Conundrum	A confusing and difficult problem or question.
Copious	Abundant in supply or quantity.
Credulous	Willing to believe or trust too readily, often without proper evidence.
Cryptic	Having a meaning that is mysterious or obscure.
Cacophony	A harsh, discordant mixture of sounds.
Capitulate	To surrender or give in to an opponent.
Circumlocution	The use of unnecessarily long or indirect words.
Clandestine	Kept secret or done secretly, often for illicit purposes.
Conundrum	A confusing and difficult problem or question.
Copious	Abundant in supply or quantity.
Credulous	Willing to believe or trust too readily, often without proper evidence.
Cryptic	Having a meaning that is mysterious or obscure.

Difficult Words in English Vocabulary Starting with the Letter ‘D’

Here are some difficult words in English vocabulary starting with the letter ‘D’ along with their meanings:

Word	Meaning
Defenestration	The act of throwing someone out of a window.
Denouement	The final resolution or outcome of a story or situation.
Desultory	Lacking a plan, purpose, or enthusiasm; random.
Discombobulate	To confuse or disconcert; upset the normal operation or function of something.
Disparate	Essentially different in kind; not allowing comparison.
Disquisition	A long or elaborate essay or discussion on a particular subject.
Dystopian	Relating to or denoting an imagined state or society where there is great suffering or injustice.

Difficult Words in English Vocabulary Starting with the Letter ‘E’

Here are some difficult words in English vocabulary starting with the letter ‘E’ along with their meanings:

Word	Meaning
Epistemology	The study of the nature and scope of knowledge.
Esoteric	Intended for or understood by only a select few; obscure.
Ephemeral	Lasting for a very short time; transient.
Ebullient	Overflowing with enthusiasm or excitement.
Effervescent	Bubbling, fizzy; lively and enthusiastic.
Enervate	To weaken or drain of energy; to tire out.
Enigmatic	Mysterious, puzzling, or difficult to understand.
Euphemism	A mild or indirect word or phrase used in place of a harsh or blunt one.
Exacerbate	To make a situation or problem worse.
Extraneous	Irrelevant or unrelated to the subject at hand.

Difficult Words in English Vocabulary Starting with the Letter ‘F’

Here’s a list of difficult words in English vocabulary starting with the letter ‘F,’ along with their meanings:

Word	Meaning
Facetious	Treating serious issues with inappropriate humor.
Fatuous	Silly and pointless; foolish.
Fecund	Fertile, capable of producing offspring or vegetation.
Fervent	Having or displaying a passionate intensity.
Flummox	To bewilder, confuse, or perplex.
Frenetic	Fast and energetic in a rather wild and uncontrolled way.
Frugal	Sparing or economical with regard to money or food.
Fulgent	Shining brightly; radiant.
Fusillade	A rapid series of shots or missiles fired at once.
Futile	Incapable of producing any useful result; pointless.

Difficult Words in English Vocabulary Starting with the Letter ‘G’

Here are some difficult words in English vocabulary starting with the letter ‘G’ along with their meanings:

Word	Meaning
Gobbledygook	Language that is meaningless or jargon.
Garrulous	Excessively talkative, especially on trivial matters.
Grandiloquent	Pompous or extravagant in language, style, or manner.
Gargantuan	Enormous, gigantic, or colossal in size.
Gratuitous	Given or done without any good reason or justification.
Gregarious	Fond of company, sociable, or friendly.
Guileless	Innocent, without deceit or cunning.
Glabrous	Smooth and hairless, especially skin or leaves.
Gourmand	A person who enjoys eating and often eats in large quantities.
Grandiosity	The quality of being grand or ambitious, especially in a showy or pretentious way.

Difficult Words in English Vocabulary Starting with the Letter ‘H’

Here’s a list of difficult words in English vocabulary starting with the letter ‘H’ along with their meanings:

Difficult Word	Meaning
Hapax Legomenon	A word that occurs only once in a language’s written record.
Heliolatry	The worship or veneration of the sun.
Heterodox	Holding unorthodox or unconventional beliefs.
Hircine	Pertaining to or resembling a goat.
Histrionics	Exaggerated dramatic behavior designed to attract attention.
Hypnagogic	Relating to the state just before falling asleep.
Hypochondria	Excessive worry or anxiety about one’s health.
Hypothecate	To pledge something as security without giving up possession of it.
Hyperborean	Pertaining to the extreme north or cold regions.
Hypercritical	Excessively critical or fault-finding.

Difficult Words in English Vocabulary Starting with the Letter ‘I’

Here’s a list of difficult words in English vocabulary starting with the letter ‘I,’ along with their meanings:

Word	Meaning
Ineffable	Too great or extreme to be expressed or described in words.
Iconoclast	A person who attacks or criticizes cherished beliefs or institutions.
Intransigent	Unwilling or refusing to change one’s views or to agree about something.
Irascible	Easily angered or prone to outbursts of temper.
Inscrutable	Impossible to understand or interpret.
Insidious	Proceeding in a gradual, subtle way, but with harmful effects.
Incorrigible	Not able to be corrected, improved, or reformed.
Inefficacious	Not producing the desired effect; ineffective.
Iniquitous	Grossly unfair and morally wrong.
Iconoclastic	Characterized by attacking or rejecting established traditions or institutions.

Difficult Words in English Vocabulary Starting with the Letter ‘J’

Here is a list of difficult words in English vocabulary that start with the letter ‘J,’ along with their meanings:

Word	Meaning
Jeremiad	A long, mournful complaint or lamentation; a list of woes.
Juxtaposition	The act or placement of two things (usually abstract concepts) near each other.
Jejune	Lacking interest or significance; immature or childish.
Juxtapose	To place or deal with close together for contrasting effect.
Jaundiced	Showing or affected by prejudice or bitterness.
Jettison	To discard or cast off, especially something considered as no longer valuable or useful.
Jocund	Cheerful and lighthearted in disposition or nature.

Difficult Words in English Vocabulary Starting with the Letter ‘K’

Here are some difficult words in English vocabulary starting with the letter ‘K’ along with their meanings:

Word	Meaning
Kaleidoscope	A constantly changing pattern or sequence of elements.
Kowtow	To act in an excessively subservient manner; to grovel.
Kismet	Destiny or fate, often seen as predetermined.
Kitsch	Art or objects that are considered in poor taste.
Kenophobia	The fear of voids or empty spaces.
Knavery	Dishonest or unscrupulous behavior.
Kinesiology	The scientific study of human movement and muscle function.
Knavish	Mischievous or deceitful in a playful way.
Kinescope	An early form of television recording.
Kowtow	To act in an excessively subservient manner; to grovel.

Difficult Words in English Vocabulary Starting with the Letter ‘L’

Here’s a list of difficult words in English vocabulary starting with the letter ‘L,’ along with their meanings:

Word	Meaning
Lethologica	The inability to remember a word or a name.
Languor	A pleasant feeling of weariness or laziness.
Loquacious	Tending to talk a lot; talkative.
Lugubrious	Looking or sounding sad and dismal.
Lexicon	A dictionary or the vocabulary of a language.
Labyrinthine	Complicated, intricate, or confusing.
Luminous	Emitting or reflecting light; glowing.
Lackadaisical	Lacking enthusiasm or determination; lazy.
Lucubrate	To work diligently and meticulously, especially on scholarly or literary work.
Laconic	Using very few words; concise.

Difficult Words in English Vocabulary Starting with the Letter ‘M’

Here is a list of difficult words in English vocabulary starting with the letter ‘M’ along with their meanings:

Word	Meaning
Mellifluous	Sweet or musical; pleasant to hear.
Misanthrope	A person who dislikes or distrusts humanity.
Maelstrom	A powerful whirlpool; a chaotic or turbulent situation.
Mephitic	Having a foul odor; noxious or poisonous.
Mawkish	Excessively sentimental; sappy or cloying.
Multifarious	Diverse, having many different parts or elements.
Mendacious	Given to lying or deception; dishonest.
Machination	A crafty or cunning scheme or plot.
Myopic	Nearsighted; lacking foresight or narrow-minded.
Magnanimous	Very generous or forgiving, especially toward a rival or someone less powerful.

Difficult Words in English Vocabulary Starting with the Letter ‘N’

Here are some difficult words in English vocabulary starting with the letter ‘N,’ along with their meanings:

Word	Meaning
Nefarious	Wicked, villainous, or criminal.
Nomenclature	The system or set of terms used in a particular field or subject.
Nonchalant	Feeling or appearing casually calm and relaxed; not displaying anxiety.
Nostalgia	A sentimental longing or affection for the past, typically for a period or place with happy personal associations.
Noxious	Harmful, poisonous, or very unpleasant.
Nuance	A subtle difference or distinction in meaning, expression, tone, etc.
Numinous	Having a strong religious or spiritual quality; mysterious and awe-inspiring.
Nuncio	A papal ambassador or diplomatic representative.
Nurturance	The provision of care and support to promote the growth and development of someone or something.
Nebulous	Hazy, vague, or unclear; lacking definite form or limits.

Difficult Words in English Vocabulary Starting with the Letter ‘O’

Here are some difficult words in English vocabulary starting with the letter ‘O’ along with their meanings:

Word	Meaning
Obfuscate	To render obscure, unclear, or unintelligible.
Obstreperous	Noisy and difficult to control; unruly.
Odious	Extremely unpleasant; deserving hatred.
Ostracize	To exclude or banish someone from a group or society.
Obsequious	Excessively eager to please or serve others; fawning.
Opaque	Not transparent; not allowing light to pass through.
Onerous	Involving a great deal of effort or difficulty; burdensome.
Obdurate	Stubbornly refusing to change one’s opinion or course of action.
Omnipotent	Having unlimited or infinite power; all-powerful.
Ostentatious	Designed to impress or attract attention; showy.

Difficult Words in English Vocabulary Starting with the Letter ‘P’

Here’s a list of difficult words in English vocabulary starting with the letter ‘P,’ along with their meanings:

Word	Meaning
Pernicious	Having a harmful effect, especially in a gradual or subtle way.
Palimpsest	A manuscript or piece of writing material on which the original writing has been effaced to make room for later writing but of which traces remain.
Panacea	A solution or remedy for all difficulties or diseases; a cure-all.
Parochial	Relating to a church parish; having a limited or narrow outlook.
Penultimate	The second to the last in a series of things; second last.
Perspicacious	Having a ready insight into and understanding of things.
Phantasmagoria	A sequence of real or imaginary images like that seen in a dream.
Polyglot	Knowing or using several languages.
Precarious	Not securely held or in position; dangerously likely to fall or collapse.
Prognosticate	Foretell or prophesy (an event in the future).

Difficult Words in English Vocabulary Starting with the Letter ‘Q’

Here’s a list of difficult words in English vocabulary starting with the letter ‘Q,’ along with their meanings:

Word	Meaning
Quixotic	Exceedingly idealistic; unrealistic and impractical
Quotidian	Occurring daily; commonplace
Querulous	Complaining in a whining manner
Quiescent	Inactive; at rest
Quintessential	Representing the most perfect or typical example
Quagmire	A difficult or precarious situation
Quip	A witty or sarcastic remark
Quaff	To drink deeply and enthusiastically
Quizzical	Expressing confusion or curiosity
Quandary	A state of uncertainty or perplexity

Difficult Words in English Vocabulary Starting with the Letter ‘R’

Here are some difficult words in English vocabulary starting with the letter ‘R,’ along with their meanings:

Word	Meaning
Recumbentibus	A witty comeback you think of too late.
Rambunctious	Uncontrollably exuberant or boisterous.
Redolent	Having a strong, pleasant odor or fragrance.
Recalcitrant	Resisting authority or control; rebellious.
Reticent	Inclined to keep one’s thoughts and feelings private; reserved.
Resplendent	Shining brilliantly; splendid or magnificent in appearance.
Rhapsodize	To express in an enthusiastic or ecstatic manner.
Repudiate	To reject or disown; refuse to accept.
Recondite	Obscure, little known; requiring specialized knowledge to understand.
Reprobate	A morally unprincipled person; a scoundrel.

Difficult Words in English Vocabulary Starting with the Letter ‘S’

Here’s a list of difficult words in English vocabulary starting with the letter ‘S’ along with their meanings:

Word	Meaning
Sesquipedalian	(of a word) Polysyllabic; long-winded.
Sycophant	A person who acts obsequiously toward someone in power.
Sycophancy	Excessive flattery or praise used to gain advantage.
Soliloquy	An act of speaking one’s thoughts aloud when alone.
Supercilious	Behaving or looking as though one is superior.
Serendipity	The occurrence of events by chance in a happy way.
Sophistry	The use of clever but false arguments, especially with the intention of deceiving.
Sanguine	Optimistic or positive, especially in a difficult situation.
Surreptitious	Kept secret, especially because it would not be approved of.
Sardonic	Grimly mocking or cynical.

Difficult Words in English Vocabulary Starting with the Letter ‘T’

Here’s a list of difficult words in English vocabulary starting with the letter ‘T’ along with their meanings:

Word	Meaning
Tenebrous	Dark, shadowy, or obscure.
Tergiversate	To change one’s loyalties or opinions frequently.
Triskaidekaphobia	Fear of the number 13.
Taciturn	Reserved or uncommunicative in speech; reticent.
Trepidation	A feeling of fear or agitation about something that may happen.
Tenacious	Holding fast; persistent; not easily letting go.
Trenchant	Incisive or keen; vigorously effective and articulate.
Tumultuous	Making a loud, confused noise; uproarious.
Tyro	A beginner or novice.
Turpitude	Depravity; wickedness.

Difficult Words in English Vocabulary Starting with the Letter ‘U’

Here’s a list of difficult words in English vocabulary that start with the letter ‘U,’ along with their meanings:

Difficult Word	Meaning
Ubiquitous	Present, appearing, or found everywhere.
Ulterior	Existing beyond what is obvious or evident.
Umbrage	A feeling of offense or resentment.
Unctuous	Excessively flattering or insincerely polite.
Unilateral	Involving only one party or group.
Unobtrusive	Not attracting attention or notice.
Unpalatable	Not pleasant to the taste or mind.
Unscrupulous	Lacking moral or ethical principles.
Usurp	To seize or take over power or authority.
Utilitarian	Designed to be practical rather than attractive or aesthetic.

Difficult Words in English Vocabulary Starting with the Letter ‘V’

Here’s a list of difficult words in English vocabulary that start with the letter ‘V’ along with their meanings:

Word	Meaning
Verisimilitude	The appearance of being true or real.
Verbose	Using or expressed in more words than needed.
Vexatious	Causing annoyance, frustration, or worry.
Visceral	Relating to deep inward feelings rather than the intellect.
Vituperate	To criticize or censure severely or abusively.
Voluptuous	Relating to or characterized by luxury or sensual pleasure.
Voluminous	Occupying or containing much space; large in volume.
Voracious	Having a very eager approach to an activity, especially eating.

Difficult Words in English Vocabulary Starting with the Letter ‘W’

Here’s a list of difficult words in English vocabulary starting with the letter ‘W’ along with their meanings:

Word	Meaning
Weltanschauung	A particular philosophy or view of life; worldview.
Welter	A confused mass or jumble; to roll about in disorder.
Whimsical	Playfully quaint or fanciful, especially in an amusing way.
Wraith	A ghostly or spectral image of a person, especially one seen shortly before or after their death.
Wunderkind	A child prodigy or exceptionally talented young person.

Difficult Words in English Vocabulary Starting with the Letter ‘X’

Here’s a list of difficult words in English vocabulary starting with the letter ‘X’ along with their meanings:

Word	Meaning
Xenophobe	A person who is fearful of or dislikes foreigners or strangers.
Xenophobia	The intense dislike or fear of people from other countries.
Xenodochial	Friendly or hospitable, especially to strangers or foreigners.
Xerophyte	A plant adapted to dry or arid conditions, often with thick, water-storing leaves or stems.
Xylography	The art or practice of engraving on wood, or the resulting engraved woodcut.
Xenogenesis	The production of offspring that are different from their parents.
Xenolithic	Relating to rocks or minerals originating from a different place or environment.
Xerography	A photocopying process that uses electrostatic charges on a light-sensitive surface to reproduce images or text.
Xenomorphic	Having a different or irregular shape or form.
Xenotransplantation	The transplantation of organs or tissues from one species to another, often from animals to humans.

Difficult Words in English Vocabulary Starting with the Letter ‘Y’

Here are some difficult words in English vocabulary starting with the letter ‘Y’ along with their meanings:

Word	Meaning
Yokel	An unsophisticated person from the countryside; a bumpkin.
Yawp	To make a harsh or loud cry; a noisy complaint or protest.
Yaffle	To eat or drink noisily and greedily; to consume in a voracious manner.
Yegg	A burglar or safe-cracker, typically a criminal.
Ylem	A hypothetical primordial substance from which the universe was formed.

Difficult Words in English Vocabulary Starting with the Letter ‘Z’

Here are some difficult words in English vocabulary starting with the letter ‘Z’ along with their meanings:

Word	Meaning
Zugzwang	A situation in which one is forced to make a move that puts them at a disadvantage, often used in chess strategy.
Zenith	The highest point or peak; the culmination of success or achievement.
Zephyr	A gentle, mild breeze or wind.
Zestful	Full of enthusiasm, energy, and zeal; lively and spirited.
Zeitgeist	The defining spirit or mood of a particular period in history.
Ziggurat	A rectangular stepped tower, often with a temple at the top, found in ancient Mesopotamian architecture.
Zoetrope	A device that produces the illusion of motion by displaying a rapid succession of static images or pictures.
Zephyrous	Pertaining to or resembling a zephyr; gentle and airy in nature.
Zoonosis	A disease that can be transmitted from animals to humans.
Zeugma	A figure of speech in which a word applies to multiple parts of a sentence, often in a humorous or unexpected way.

Conclusion

Exploring difficult words in the English language can be an exciting linguistic adventure. While they may be challenging at first, incorporating these words into your vocabulary can add depth and nuance to your communication. So, let’s embrace the richness of the English language and make room for these intriguing words in our lexicon.

Difficult Words in English- FAQ’s

What are 20 tricky words?

Here are the list of 20 Tricky Words Miscellaneous,Supercalifragilisticexpialidocious,Onomatopoeia,Hippopotomonstrosesquippedaliophobia,Antidisestablishmentarianism,Pseudopseudohypoparathyroidism,Floccinaucinihilipilification,Labyrinthine,Sesquipedalian,Quixotic,Synecdoche,Esoteric,Defenestration,Serendipity,Colloquial,Ephemeral,Obfuscate,Soliloquy,Paradox,Sycophant

What are the 20 difficult words with meaning?

Obfuscate - to make something unclear or difficult to understand. Soliloquy - a speech in a play where a character speaks their thoughts aloud. Labyrinthine - complicated and confusing, like a maze. Hippopotomonstrosesquippedaliophobia - the fear of long words. Onomatopoeia - a word that sounds like the sound it represents (e.g., buzz or moo). Quixotic - overly idealistic, impractical, and unrealistic. Antidisestablishmentarianism - opposition to the disestablishment of a state church. Ephemeral - lasting for a very short time, transient. Floccinaucinihilipilification - the act of estimating something as worthless. Sesquipedalian - a long word or characterized by the use of long words. Paradox - a statement that contradicts itself but might be true. Synecdoche - a figure of speech where a part is used to represent the whole. Esoteric - intended for or understood by only a small number of people. Colloquial - used in ordinary or familiar conversation, not formal. Defenestration - the act of throwing someone out of a window. Sycophant - a person who acts obsequiously toward someone important to gain advantage. Pseudopseudohypoparathyroidism - a rare genetic disorder. Serendipity - finding something good without looking for it. Paragon - a model of excellence or perfection. Mellifluous - having a smooth, pleasant, and flowing sound.

What is the most difficult English word to pronounce?

Most Difficult English Words to Pronounce: Worcestershire Entrepreneur Synecdoche Anemone Chiaroscurist Squirrel Rural Sixth Ruritanian Otorhinolaryngologist

What are the most difficult vocabulary words?

Determining the absolute most difficult vocabulary words can be subjective, but here's a list that includes words known for their complexity or rare usage: Sesquipedalian Pseudopseudohypoparathyroidism Hippopotomonstrosesquippedaliophobia Antidisestablishmentarianism Floccinaucinihilipilification Labyrinthine Supercalifragilisticexpialidocious Onomatopoeia Eschatology Pulchritudinous

What is the hardest word for kids to say?

One of the words that many kids find challenging to pronounce is supercalifragilisticexpialidocious. It's famously known from the movie Mary Poppins, and its length and unusual combination of sounds can make it quite difficult for young children to say.