mantra (n.)youdaoicibaDictYouDict[mantra 词源字典]
1808, "that part of the Vedas which contains hymns," from Sanskrit mantra-s "sacred message or text, charm, spell, counsel," literally "instrument of thought," related to manyate "thinks," from PIE root *men- "to think" (see mind (n.)). Sense of "special word used for meditation" is first recorded in English 1956.[mantra etymology, mantra origin, 英语词源]