ざんにん 残忍 LinksSentence search for 残忍Sentence search for ざんにんSentence search for 惨忍Kanji details for 残 and 忍Edit in JMdict Na-adjective (keiyodoshi), Noun1. brutal; cruel; merciless; ruthless; cold-bloodedOther forms惨忍 【ざんにん】Notes惨忍: Rarely-used kanji form. Discussions Log in to talk about this word.