すぐれない

i-adjective

unwell; not in good condition

Used especially for health or physical condition, often in negative form 優れない. Implies a mild, lingering poor state rather than acute illness.

See also: 優れる

• 今日きょうは体たい調ちょうが優すぐれないので、早そう退たいします。

  I'm not feeling well today, so I'll leave early.