突 (tū) means “In “突然”: sudden”. The 突 stroke order has 9 strokes; the animation above shows them one at a time. Its radical is 穴. To practise how to write 突, open writing practice; to hear how to pronounce 突, use the pronunciation trainer.
Words with 突
突然 — tū rán, sudden; abrupt; unexpected
突然 — tū rán, sudden; abrupt; unexpected
突出 — tū chū, prominent; outstanding; to give prominence to; to protrude; to project
