unwell adj.
VERBS appear, be, feel, look, seem, sound He complained of feeling unwell. | become | remain | make sb
ADV. extremely, really, very | a little, vaguely patients who just feel vaguely unwell
PREP. with You should delay vaccination if you are unwell with a fever.
You can also check other dicts: unwell (English, 中文解释 ), wordnet sense, Collins Definition