Roget's Thesaurus by Peter Mark Roget

declension of strength, loss of strength, failure of strength; delicacy, invalidation, decrepitude, asthenia[obs3], adynamy[obs3], cachexy[obs3], cachexia[Med], sprain, strain. reed, thread, rope of sand, house of cards. softling[obs3], weakling; infant &c. 129; youth &c. 127. V. be weak &c. adj.; drop, crumble, give way, totter, tremble, shake, halt, limp, fade, languish, decline, flag, fail, have one leg in the grave. render weak &c. adj.; weaken, enfeeble, debilitate, shake, deprive of strength, relax, enervate, eviscerate; unbrace, unnerve; cripple, unman &c. (render powerless) 158; cramp, reduce, sprain, strain, blunt the edge of; dilute, impoverish; decimate; extenuate; reduce in strength, reduce the strength of; mettre de l'eau dans son vin[Fr]. Adj. weak, feeble, debile|; impotent &c. 158; relaxed, unnerved, &c. v.; sapless, strengthless[obs3], powerless; weakly, unstrung, flaccid, adynamic[obs3], asthenic[obs3]; nervous. soft, effeminate, feminate[obs3], womanly. frail, fragile, shattery[obs3]; flimsy, unsubstantial, insubstantial, gimcrack, gingerbread; rickety, creaky, creaking, cranky; craichy[obs3]; drooping, tottering &c. v.. broken, lame, withered, shattered, shaken, crazy, shaky; palsied &c. 158; decrepit. languid, poor, infirm; faint, faintish[obs3]; sickly &c. (disease) 655; dull, slack, evanid|, spent, short-winded, effete; weather-beaten; decayed, rotten, worn, seedy, languishing, wasted, washy, laid low, pulled down, the worse for wear. unstrengthened &c. 159[obs3], unsupported, unaided, unassisted; aidless[obs3], defenseless &c. 158; cantilevered (support) 215. on its last legs; weak as a child, weak as a baby, weak as a chicken, weak as a cat, weak as a rat; weak as water, weak as water gruel, weak as gingerbread, weak as milk and water; colorless &c. 429. Phr. non sum qualis eram[Lat].