積せっ極きょく行こう動どう主しゅ義ぎ者しゃMeaningsNoun1. activistKanji used積pile up and accumulate極extreme行go動move主(one's) master義justice者someoneComposed of積せっ極きょくactive; positive; progressivePrenominal行こう動どうaction; conduct; behaviour; behavior; mobilization; mobilisationNoun主しゅ義ぎ者しゃadvocate (of a theory or principle); ideologist; ideologue; -ist (i.e. adherent to a belief system)Noun