ailing
/ˈeɪ.lɪŋ/verb
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To cause to suffer; to trouble, afflict. (Now chiefly in interrogative or indefinite constructions.)
"Have some chicken soup. It's good for what ails you."
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To be ill; to suffer; to be troubled.
noun
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An ailment.
adjective
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Sickly; sick; ill; unwell.
"She cared for her ailing brother day in, day out."