sudden; abrupt; unexpected
突 (tū) · 9 strokes
Depicts a dog (犬) suddenly running out of a cave (穴).
然 (rán) · 12 strokes
Phonosemantic compound. 灬 represents the meaning and 肰 represents the sound. Based on the original meaning "burn", now written as 燃. The current meaning is a phonetic loan.