清 is built from the 氵 (water (left)) and 青 components.
It reads セイ like 青, as do 情, 請, 精, and 静 — learn 青 once and the family's reading comes with it.
A common word using 清 is 清い (きよい), meaning “clear, pure, noble”.
Don't confuse it with 精, 晴, 静, and 情.
