different between indisposed vs unwell

English

in- +? disposed

indisposed (comparative more indisposed, superlative most indisposed)

Mildly ill.
He was indisposed with a cold.
Not disposed, predisposed, or inclined; unwilling.
I stayed indoors all day, feeling indisposed to finish mowing the lawn.
Not yet ready (especially with regard to receiving a visitor) because not yet arranged into a state of readiness (i.e., not disposed); (especially, more specifically):
1. (euphemistic) In the lavatory/WC.
2. (euphemistic) Undressed; not yet dressed enough to be seen by visitors.

From un- +? well.

unwell (comparative more unwell, superlative most unwell)

Not in good health; not feeling well; somewhat ill
Synonyms: ailing, under the weather; see also Thesaurus:diseased
(dated, euphemistic) Specifically, ill from menstruation; affected with, or having, catamenial; menstruant.

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