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Affixes: the building blocks of English
Affixes: the building blocks of English
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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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