洞 (dòng) means “cave”. The 洞 stroke order has 9 strokes; the animation above shows them one at a time. Its radical is 氵. To practise how to write 洞, open writing practice; to hear how to pronounce 洞, use the pronunciation trainer.
Words with 洞
洞 — dòng, cave; hole; zero (unambiguous spoken form when spelling out numbers)
洞 — dòng, cave; hole; zero (unambiguous spoken form when spelling out numbers)