
Unwell
Physical Discomfort
Use 'unwell' when someone doesn't feel physically healthy, but it's not very serious.

I felt unwell after eating too much cake.
Mild Illness
'Unwell' often hints at a mild illness rather than a severe one.

She's been unwell with a bit of a fever.
Short-term Condition
It generally suggests a temporary condition, not a long-term health issue.

He's unwell today, probably will be fine by tomorrow.
Compare with
AilDiseasedHealthyIllInfirmPoorQueasySickUnder the weatherWeak
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