morose (adj.)youdaoicibaDictYouDict[morose 词源字典]
1530s "gloomy," from Latin morosus "morose, peevish, hypercritical, fastidious," from mos (genitive moris) "habit, custom" (see moral (adj.)). In English, manners by itself means "(good) manners," but here the implication in Latin is "(bad) manners." Related: Morosity.[morose etymology, morose origin, 英语词源]