污 (wū)
variant of 污[wu1]
Etymology
Phonosemantic compound. 氵 represents the meaning and 亏 (于) represents the sound.
Shuowen Jiezi
《說文》：“汙，薉也。一曰小池為汙。一曰涂也。从水，于聲。”
Components
- 氵 (meaning) — water
- 于 (sound) — 亏 and 于 both come from the same ancient character.