突然

tūrán
sudden; abrupt; unexpected

CEDICT

Entry Composition

1 突 tū
  1. to dash
  2. to move forward quickly
  3. to bulge
  4. to protrude
  5. to break through
  6. to rush out
  7. sudden
  8. Taiwan pr. tú
2 然 rán
  1. correct
  2. right
  3. so
  4. thus
  5. like this
  6. -ly