晴
セイ, は.れる, は.れ, は.れ, ば.れ, は.らす, はる, はれ
clear up
JLPT3 G2 S12 F1022
As per 青# (clean/pure) +
日
sun/day → *clear day* → *clear up*. Note the variant form 晴.
[Full Kanji Etymology List]