The building blocks of English
Affixes
hydr(o)-2
Hydrogen
>Greek hudōr, hudro‑, water.
Hydrogen is the ‘water maker’ because it produces water when burned in air or oxygen; hydrochloric acid is a strongly acidic solution of the gas hydrogen chloride in water; the hydroxonium ion is H3O+, the hydrated hydrogen ion. A hydrocarbon is a compound of hydrogen and carbon; a hydride is a binary compound of hydrogen with a metal; hydrazine (hydro‑ plus azo‑ and ‑ine3) is a fuming liquid often used as a rocket fuel; hydrogenation is the chemical addition of hydrogen to a substance. See also dehydro‑.
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