1. (v. t.) 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.
2. (v. i.) To be affected with pain or uneasiness of any sort; to be ill or indisposed or in trouble.
3. (n.) Indisposition or morbid affection.
Thesaurus Entries
ache, afflict, agonize, anguish, be affected with, be the matter, beset, bite, blanch, blench, bother, burn, chafe, complain of, complicate matters, concern, convulse, crucify, cut, discommode, distress, disturb, excruciate, feel ill, feel pain, feel the pangs, fester, fret, gall, give pain, gnaw, grate, grimace, grind, gripe, harass, harrow, have a misery, hurt, inconvenience, inflame, inflict pain, irk, irritate, kill by inches, labor under, lacerate, martyr, martyrize, nip, pain, perplex, perturb, pierce, pinch, plague, pother, pound, prick, prolong the agony, put out, put to it, put to torture, puzzle, rack, rankle, rasp, rub, shoot, shrink, smart, stab, sting, suffer, thrill, throb, tingle, torment, torture, trouble, try, tweak, twinge, twist, twitch, upset, vex, wince, worry, wound, wring, writhe
