洞 (dòng)
cave; hole; zero (unambiguous spoken form when spelling out numbers);
- HSK 3.1 level 5
- 9 strokes
Etymology
Phonosemantic compound. 氵 represents the meaning and 同 represents the sound.
Shuowen Jiezi
《說文》：“洞，疾流也。从水，同聲。”
Components
- 氵 (meaning) — 氵 is a component form of 水.
- 同 (sound)