cynical (adj.)youdaoicibaDictYouDict[cynical 词源字典]
1580s, "resembling Cynic philosophers," from cynic + -al (1). By late 17c. the meaning had shaded into the general one of "critical, disparaging the motives of others, captious, sneering, peevish." Related: Cynically.[cynical etymology, cynical origin, 英语词源]