Synonyms:
ailing, indisposed, peaked(p), poorly(p), sickly, unwell, under_the_weather, seedy
Meaning: somewhat ill or prone to illness; "my poor ailing grandmother"; "feeling a bit indisposed today"; "you look a little peaked"; "feeling poorly"; "a sickly child"; "is unwell and can't come to work"
Usage examples
But never a word of the Vicar's being ailing!'
"My niece has been ailing of late," explained Mrs. McClure.
Lanyard, for one, wouldn't have thought him the properest company or the best Parisian cicerone for an ailing American gentleman blessed with independent means and an attractive daughter.