しょうわる 性悪 LinksSentence search for 性悪Sentence search for しょうわるSentence search for せいあくKanji details for 性 and 悪Edit in JMdict Na-adjective (keiyodoshi), Noun1. ill-natured; inconstancyOther forms性悪 【せいあく】 Discussions Log in to talk about this word.