残ざん忍にん非ひ道どうConjugationsMeaningsNounNa-adjective1. cruel and inhuman; brutal; mercilessKanji used残left behind忍ninja非go against道roadwayComposed of残ざん忍にんbrutal; cruel; merciless; ruthless; cold-bloodedNa-adjective非ひ道どうunjust; inhumanNa-adjective