Ail

(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.

(v. i.)

To be affected with pain or uneasiness of any sort; to be ill or indisposed or in trouble.

(n.)

Indisposition or morbid affection.