動どう力りょく因いんMeaningsNoun1. efficient cause (one of Aristotle's four fundamental types of answer to the question "why?")Kanji used動move力power因causePitch accentどうりょくいんComposed of動どう力りょくpower; motive power; three-phase electricityNoun因いんcause; factor; hetu (direct cause, esp. as opposed to indirect conditions); the basis of one's argument (in hetuvidya)Noun