Example : 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.

Synonyms : ailing, peaked, poorly, seedy, sickly, under the weather, unwell

Example : Antipathetic to new ideas.
Averse to taking risks.
Loath to go on such short notice.
Clearly indisposed to grant their request.

Synonyms : antipathetic, antipathetical, averse, loath, loth