strangulation (n.)youdaoicibaDictYouDict[strangulation 词源字典]
1540s, from Latin strangulationem (nominative strangulatio) "a choking, a suffocating," noun of action from past participle stem of strangulare (see strangle). The verb strangulate (1660s) probably is a back-formation from this. Related: Strangulated.[strangulation etymology, strangulation origin, 英语词源]
triangulation (n.)youdaoicibaDictYouDict
1809, from French triangulation, from Medieval Latin triangulationem (mid-12c., nominative triangulatio), noun of action from Latin *triangulare, from triangulum (see triangle).