conscious (adj.)youdaoicibaDictYouDict[conscious 词源字典]
c. 1600, "knowing, privy to," from Latin conscius "knowing, aware," from conscire (see conscience); probably a loan-translation of Greek syneidos. A word adopted from the Latin poets and much mocked at first. Sense of "active and awake" is from 1837.[conscious etymology, conscious origin, 英语词源]