Related forms weak·en·er, noun
re·weak·en, verb
un·weak·ened, adjective
un·weak·en·ing, adjective
Synonyms
1, 3. enfeeble, debilitate, enervate, undermine, sap, exhaust, deplete, lessen, diminish, lower, reduce, impair, minimize, invalidate.
Antonyms
1, 3. strengthen.