Webster's Revised Unabridged Dictionary · 1913

Impoverish

Impoverish , transitive verb

[Old French empovrir; pref. em- (Latin in) + povre poor, French pauvre; compare Old French apovrir, French appauvrir, where the prefix is a-, Latin ad. Compare Empoverish, and see Poor, and -ish.]

1.
To make poor; to reduce to poverty or indigence; as, misfortune and disease impoverish families.
2.
To exhaust the strength, richness, or fertility of; to make sterile; as, to impoverish land.