陰
イン, かげ, かげ.る

shade, yin, negative, sex organs, secret, shadow

JLPT1 G7 S11 F1393

侌# is 云 (rising vapors) + 今 (contain) → be clouded over and gloomy. 陰 adds 阜 piled earth → cloud-shadowed side of a hill → *be clouded over*; *shadow*; *dark*; *obscure* → *back/behind*; *negative*; *gloomy*.

[Full Kanji Etymology List]