きゅうへん 急変 Common word LinksSentence search for 急変Sentence search for きゅうへんKanji details for 急 and 変Edit in JMdict Noun, Suru verb, Intransitive verb1. sudden turn; sudden changeじたい事態はきゅうへん急変した。There was a sudden change in the situation.Noun2. (suddenly occurring) accident; emergencyサイレンがきゅうへん急変をし知らせました。The siren sounded an emergency. Discussions Log in to talk about this word.