Latin word for water is

The Latin word Hydro means to produce water. When hydrogen atoms are combined with oxygen atoms by 2: 1 ratio then water is formed.

$\text{Two\hspace{0.17em}\hspace{0.17em}H\hspace{0.17em}(atoms)\hspace{0.17em}\hspace{0.17em}+\hspace{0.17em}one\hspace{0.17em}\hspace{0.17em}\hspace{0.17em}O\hspace{0.17em}(atom)\hspace{0.17em}}\to {\text{\hspace{0.17em}H}}_{\text{2}}\text{O\hspace{0.17em}(water)}$