gemination (n.)youdaoicibaDictYouDict[gemination 词源字典]
1590s, "a doubling," from Latin geminationem (nominative geminatio) "a doubling," noun of action from past participle stem of geminare "to double, repeat" (see geminate). In rhetoric, repetition of a word or phrase for emphasis.[gemination etymology, gemination origin, 英语词源]