Thesaurus

Synonyms for Weakened include:

ablated, adynamic, anaemic, anemic, anosmic, asthenic, attenuate, attenuated, bated, battered, beat-up, beaten-up, bedraggled, belittled, bent, blemished, broken, broken-backed, broken-down, burst, busted, crumpled, cut, damaged, debilitated, decreased, defaced, delicate, dented, derelict, destroyed, dickey, dicky, dilapidated, dilute, diluted, diminished, dysfunctional, dyslectic, dyslexic, enervated, faded, faint, feeble, flaccid, flimsy, fragile, gutless, hurt, impaired, injured, jerry-built, knocked-out, lame, lax, lessened, limp, mangled, marred, minimized, mutilated, namby-pamby, pale, pallid, peeling, powerless, puny, ramshackle, reduced, remittent, riddled, ruptured, scorched, scraped, scratched, shoddy, shriveled, shrivelled, shrunken, sick, slack, slashed, slight, small, spineless, storm-beaten, tatterdemalion, tender, tenuous, thin, thinned, trampled, trodden, tumble-down, untoughened, visually impaired, vitiated, vulnerable, wan, washy, watery, weak, weakened, white, wishy-washy

weakened is a ADJ.