ascetic (adj.)youdaoicibaDictYouDict[ascetic 词源字典]
1640s, from Greek asketikos "rigorously self-disciplined, laborious," from asketes "monk, hermit," earlier "one who practices an art or trade," from askein "to exercise, train," originally "to train for athletic competition, practice gymnastics, exercise."[ascetic etymology, ascetic origin, 英语词源]
self-discipline (n.)youdaoicibaDictYouDict
also self discipline, 1796, from self- + discipline (n.). Related: Self-disciplined.