self-conscious (adj.)youdaoicibaDictYouDict[self-conscious 词源字典]
1680s, "aware of one's action," a word of the English Enlightenment (Locke was using it by 1690), from self- + conscious. Morbid sense of "preoccupied with one's own personality" is attested from 1834 (in J.S. Mill). Related: Self-consciously; self-consciousness.[self-conscious etymology, self-conscious origin, 英语词源]