Impoverish, v. t. [imp. & p. p. Impoverished; p. pr. & vb. n. Impoverishing.] — Webster enters it under “impoverish”
Etymology: [OF. empovrir; pref. em- (L. in) + povre poor, F. pauvre; cf. OF. apovrir, F. appauvrir, where the prefix is a-, L. ad. Cf. 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.
Shades of meaning
Fernald lists impoverished only as an antonym, under plentiful.
He lists it without comment; the entries above explain its neighbors.
Synonyms
none given