stimulation (n.)youdaoicibaDictYouDict[stimulation 词源字典]
1520s, "act of pricking or stirring to action," from Latin stimulationem (nominative stimulatio) "an incitement," noun of action from past participle stem of stimulare "prick, goad, urge," from stimulus "spur, goad" (see stimulus).[stimulation etymology, stimulation origin, 英语词源]