Synonyms and related words :
anemic, asthenic, bloodless, chicken, cowardly, crippled, debilitated, decrepit, disabled, drooping, droopy, dull, effete, etiolated, faint, faintish, featherweight, feeble, flabby, flaccid, floppy, forceless, gone, gutless, helpless, imbecile, impotent, inactive, incapable, incapacitated, incompetent, ineffective, ineffectual, inefficacious, inert, infirm, languid, languorous, lightweight, limber, limp, listless, lustless, marrowless, nerveless, no-account, of no account, passive, pithless, pooped, rubbery, sapless, sinewless, slack, soft, spineless, strengthless, supine, unable, unauthoritative, unfit, unhardened, unnerved, unstrung, weak, weakly, without any weight