こつぜん 忽然 LinksSentence search for 忽然Sentence search for こつぜんSentence search for こつ然Kanji details for 忽 and 然Edit in JMdict 'taru' adjective, Adverb taking the 'to' particle1. sudden; abrupt; unexpectedOther formsこつ然 【こつぜん】 Discussions Log in to talk about this word.