汉字: 暗
Pinyin: àn (fourth tone)
Dark, hidden, or secret.
暗 is commonly used as an adjective to describe lack of light or secrecy.
In Chinese philosophy, light (明) and darkness (暗) often symbolize opposites, such as good and evil or clarity and obscurity.
房间里很暗，请打开灯。
The room is dark; please turn on the light.
The radical 日 (sun) reminds you of light, but the sound component 安 (ān) hints at hidden or secret meanings, opposite of brightness.