Synonyms For "Weak" :
1 syllable:
faint, frail, lame, light, limp, pale, sick, wan
2 syllables:
dilute, feeble, flimsy, gutless, human, infirm, pallid, puny, sapless, spineless, tender, unstressed, washy, weakened, weakly, wilted
3 syllables:
anaemic, anemic, asthenic, debile, decrepit, delicate, diluted, fallible, imperfect, powerless, rickety, untoughened, watery
4 syllables:
adynamic, enervated, insubstantial, unaccented, vulnerable