凹坑
āo​kēng

crater

凹 āo concave

Pictograph of a concavity. Opposite of 凸.

Historical Pronunciations

Old Chinese
Zhengzhangqriːw
qriːb

Sources

Readings & variants
Unicode
Historical pronunciations
Zhengzhang Shangfang

坑 kēng pit

Phonosemantic compound. 土 represents the meaning and 亢 represents the sound. Simplified form of 阬.

Components

土
土 Meaning component
tǔ earth
亢
亢 Sound component
kàng, gāng, gēng high

Character Evolution

Clerical form
Clerical Western Han 202 BC-9 AD
Clerical form
Clerical Western Jin 266-316 AD
Regular Modern

Historical Pronunciations

Middle ChineseOld Chinese
Zhengzhangkʰraːŋ
Unicodekæng

Sources

Readings & variants
Unicode
Historical pronunciations
Zhengzhang Shangfang
Historical images
Academia Sinica