Synonym: debilitated, feeble, fragile, impotent, powerless. Antonym: robust, strong. Similar words: weaken, wean, wear, swear, weary, weave, sweat, weather. Meaning: [wɪːk] 
adj. 1. having little physical or spiritual strength 2. overly diluted; thin and insipid 3. used of vowels or syllables; pronounced with little or no stress 4. having the attributes of man as opposed to e.g. divine beings 5. tending downward in price 6. deficient or lacking in some skill 7. lacking physical strength or vitality 8. (used of verbs) having standard (or regular) inflection 9. not having authority, political strength, or governing power 10. deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc 11. likely to fail under stress or pressure 12. deficient in intelligence or mental power.
adj. 1. having little physical or spiritual strength 2. overly diluted; thin and insipid 3. used of vowels or syllables; pronounced with little or no stress 4. having the attributes of man as opposed to e.g. divine beings 5. tending downward in price 6. deficient or lacking in some skill 7. lacking physical strength or vitality 8. (used of verbs) having standard (or regular) inflection 9. not having authority, political strength, or governing power 10. deficient in magnitude; barely perceptible; lacking clarity or brightness or loudness etc 11. likely to fail under stress or pressure 12. deficient in intelligence or mental power. 
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211. The debilitating disease made him too weak to work.
212. The play is very stale and weak dramatic art.
213. China is a developing country a weak economic foundation.
214. The tensile behaviour of fibres is dependant on the weak structure of the fibre.
215. Late Qing Dynasty weak powers, sorry, dry fly, such as blood - sucking mosquitoes.
216. She is nevertheless by no means a drinker, and one weak drink usually lasts several hours.
217. The setup densitometer lamp is too weak. Prepare for replacement.
218. A. needed against an offensively effective if defensively weak Knicks team.
219. Weak men are crushed by detraction,(www.Sentencedict.com) but the brave hold on and succeed.
220. Accept him whose faith is weak, without passing judgment on disputable matters.
221. Deriving equation, the more general weak form for elastic problems, was given.
222. The next morning the patient became extremely dyspneic and weak.
223. The critical parent role is how we find weak spots and can immobilize and demoralize others.
224. The role of the dissenter is not for the weak - kneed.
225. Vindicate the weak and fatherless; Do justice to the afflicted and destitute.
226. Weak current equipment earthing adopts integrated earthing system with earthing resistance no more than 1 ohm.