Origin: Related forms
1250–1300; Middle English weik < Old Norse veikr; cognate with Old English wāc, Dutch week, German weich; akin to Old English wīcan to yield, give way, Old Norse vīkja to move, turn, draw back, German weichen to yield
1. breakable, delicate. 2. senile, sickly, unwell, invalid. Weak, decrepit, feeble, weakly imply a lack of strength or of good health. Weak means not physically strong, because of extreme youth, old age, illness, etc.: weak after an attack of fever. Decrepit means old and broken in health to a marked degree: decrepit and barely able to walk. Feeble denotes much the same as weak but connotes being pitiable or inferior: feeble and almost senile. Weakly suggests a long-standing sickly condition, a state of chronic bad health: A weakly child may become a strong adult. 4. ineffective. 6. unsound, ineffective, inadequate, illogical, inconclusive, unsustained, unsatisfactory, lame, vague. 7. unintelligent, simple, foolish, stupid, senseless, silly. 8. vacillating, wavering, unstable, irresolute, fluctuating, undecided, weak-kneed. 9. slender, slim, inconsiderable, flimsy, poor, trifling, trivial. 11. wanting, short, lacking.