ail
From Longman Dictionary of Contemporary Englishailail /eɪl/ verb 1 → what ails something2 [intransitive, transitive] old-fashioned to be ill, or to make someone feel ill or unhappy→ See Verb tableExamples from the Corpusail• Make a kind of grand tour on my own, take the waters and cure what ails me.Origin ail Old English eglan