ailing synonyms:
adj
diseased, feeble, infirm, poorly, sick, suffering, unwell, weak. ILL.
Example:
But ailing Feron is distracted, and his ruthless silencing of an unwelcome visitor could be Grimaud’s undoing. Ambitions collide during the Dauphin’s birthday party, where a kind act by d’Artagnan pushes lovers together and ends in catastrophe.