hearten (v.)youdaoicibaDictYouDict[hearten 词源字典]
1520s, "put heart into" (transitive), from heart (n.) in the figurative sense + -en (1). Intransitive sense "to cheer up" is from 1708. Related: Heartened; heartening. Earlier verb was simply heart (Old English).[hearten etymology, hearten origin, 英语词源]