• Option A:  “Envyful” isn't the proper adjective for the given noun “envy” because there's no such word as “envyful” within the English language. Thus, option ‘A’ is not the correct choice.
• Option B:  “Envious” is an adjective which means feeling or showing envy. This is often the right adjective style for the word “envy”. For example, “Envious glances were cast at Rohini as she walked through the hallway.” So, the right answer is “Option B”.
• Option C: “Envied” is the participle of the verb “envy”. Only the tense of the verb has been changed. This is often not the adjective sort of it. For example, “Hritik’s friends could only envy him when he won a lottery worth 2 lakhs.” Thus, option ‘C’ is inaccurate.
• Option D: “Enviless” is wrong as there's no such word within the West Germanic. This word holds no meaning and isn't the adjective kind of the word “envy”. Whether or not this is able to be a word, it might have meant, without envy or empty envy as adding the suffix -less to any word makes it destitute of that attribute. Therefore, option ‘D’ is wrong.

Hence, option B is the correct answer.