verb

impair

to impair, to damage, to weaken

Lack of sleep can impair your judgment.

Lack of sleep can impair your judgment.

His hearing was impaired by the loud noise.

His hearing was impaired by the loud noise.

to impair ((sth.)) Loud music can impair your hearing.

Synonyms: damage, harm, weaken; Antonyms: improve, enhance

From Old French 'empeirier' (to make worse), from 'em-' (in) + Latin 'peior' (worse).

Think of it as making something 'worse' or 'less than a pair' (not whole).

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