| U+ | art-254 |
| 51F9 | |
| Unicode Character Names | art-315 | CJK UNIFIED IDEOGRAPH-51F9 |
| 普通话 | cmn-000 | 凹 |
| 國語 | cmn-001 | 凹 |
| Hànyǔ | cmn-003 | ao1 |
| Hànyǔ | cmn-003 | wa1 |
| Hànyǔ | cmn-003 | wa4 |
| Hànyǔ | cmn-003 | wā |
| Hànyǔ | cmn-003 | yao1 |
| Hànyǔ | cmn-003 | āo |
| English | eng-000 | concave |
| English | eng-000 | depressed |
| English | eng-000 | hollow |
| English | eng-000 | indented |
| English | eng-000 | indention |
| English | eng-000 | pass |
| English | eng-000 | valley |
| 客家話 | hak-000 | 凹 |
| Hagfa Pinyim | hak-002 | au1 |
| Hagfa Pinyim | hak-002 | au5 |
| Hagfa Pinyim | hak-002 | jap7 |
| Hagfa Pinyim | hak-002 | ngiap7 |
| Hagfa Pinyim | hak-002 | rap7 |
| 客家话 | hak-006 | 凹 |
| 日本語 | jpn-000 | 凹 |
| Nihongo | jpn-001 | kubomi |
| Nihongo | jpn-001 | kubomu |
| Nihongo | jpn-001 | ou |
| 한국어 | kor-000 | 요 |
| Hangungmal | kor-001 | yo |
| 韓國語 | kor-002 | 凹 |
| 廣東話 | yue-000 | 凹 |
| gwong2dung1 wa2 | yue-003 | aau1 |
| gwong2dung1 wa2 | yue-003 | aau3 |
| gwong2dung1 wa2 | yue-003 | lap1 |
| gwong2dung1 wa2 | yue-003 | nap1 |
| gwong2dung1 wa2 | yue-003 | ngaau1 |
| gwong2dung1 wa2 | yue-003 | ngaau3 |
| gwong2dung1 wa2 | yue-003 | waa1 |
| 广东话 | yue-004 | 凹 |