Definitions for ailing
ailing, indisposed, peaked(p), poorly(p), sickly, unwell, under the weather, seedy(adj)
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"
Present participle of to ail.