UNWELL
ailing, indisposed, peaked, poorly, sickly, unwell, under the weather, seedy
(adjective) somewhat ill or prone to illness; “my poor ailing grandmother”; “feeling a bit indisposed today”; “you look a little peaked”; “feeling poorly”; “a sickly child”; “is unwell and can’t come to work”
Source: WordNet® 3.1
Etymology
Adjective
unwell (comparative more unwell, superlative most unwell)
Not in good health; not feeling well; somewhat ill
Synonyms: ailing, under the weather, Thesaurus:diseased
(dated, euphemism) Specifically, ill from menstruation; affected with, or having, catamenial; menstruant.
Source: Wiktionary
Un*well", a.
1. Not well; indisposed; not in good health; somewhat ill; ailing.
2. (Med.)
Definition: Specifically, ill from menstruation; affected with, or having,
catamenial; menstruant.
Note: This word was formerly regarded as an Americanism, but is now
in common use among all who speak the English language.
Source: Webster’s Unabridged Dictionary 1913 Edition