AIL

AIL, verb transitive To trouble; to affect with uneasiness, either of body or mind; used to express some uneasiness or affection, whose cause is unknown; as, what ails the man? I know not what ails him.What aileth thee, Hagar? Genesis 21:17.It is never used to express a specific disease. We never say, he ails a pleurisy; but it is unusual to say, he ails something; he ails nothing; nothing ails him.AIL, noun Indisposition, or morbid affection.

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ail. Ail, Ailment, n. disorder, indisposition, pain

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Ail (āl), v. t. [imp. & p. p. Ailed (āld); p. pr. & vb. n. Ailing.] [[OE. eilen, ailen, AS. eglan to trouble, pain; akin to Goth. us-agljan to distress, agls troublesome, irksome, aglo, aglitha, pain, and prob. to E. awe. √3.]] To affect with pain or uneasiness, either physical or mental; to trouble; to be the matter with; — used to express some uneasiness or affection, whose cause is unknown; as, what ails the man? I know not what ails him. What aileth thee, Hagar? Gen. xxi. 17. ☞ It is never used to express a specific disease. We do not say, a fever ails him; but, something ails him.