uncomfortable (adj.)youdaoicibaDictYouDict[uncomfortable 词源字典]
early 15c. "causing bodily or mental discomfort, affording no comfort," from un- (1) "not" + comfortable (adj.). Intransitive meaning "feeling discomfort, ill-at-ease" is attested from 1796. Related: Uncomfortably.[uncomfortable etymology, uncomfortable origin, 英语词源]