Indisposed means slightly unwell, or unwilling to do something. She is indisposed, indisposed to help, temporarily indisposed.
The illness sense is a polite evasion — saying somebody is indisposed announces an absence without giving a reason, which is exactly why it is used. The unwillingness sense takes to and is more literal: indisposed to agree. Note dispose, which underlies both, in the sense of being inclined.
1adjectiveindisposedSlightly unwell.
“The lead singer was indisposed with a heavy cold, so the concert was cancelled.”
2adjectiveunwillingUnwilling to do something.
“After the way they had treated him, he felt indisposed to help them.”
Too few real examples of this word to estimate which sense is commonest.
indisposed is a state of unwellness or unwillingness.
From in- + disposed.
Etymology from Wiktionary, CC BY-SA