暗
アン, くら.い, くら.む, くれ.る

darkness, disappear, shade, informal, grow dark, be blinded

JLPT3 G3 S13 F1040

As per 音# (indistinct) + 日 sun/day → scant light → *dark*; *dim* → *secretly*; *hidden*; *gloomy*; *ignorant*.

[Full Kanji Etymology List]