凵, cognate of 坎, is a pictographic character. 凵 serves as a semantic component to form characters which express meanings related to “hollow, sunken, depressed, sunk, etc” such as bowl, trap, groove, ridge, pit, etc.
Characters formed by the semantic component 凵
出凹函凸凶凿极击 chū āo hán tū xiōng záo jí jī
| 笔划 | 汉字 | 拼音 | 笔划 | 汉字 | 拼音 |
| 2 | 凵 | kǎn | 4 | 凶 | xiōng |
| 5 | 凹 | āo | 5 | 出 | chū |
| 5 | 击 | jī | 5 | 凷 | kuài |
| 5 | 凸 | tū | 6 | 凼 | dàng |
| 8 | 函 | hán | 9 | 凾 | hán |
| 12 | 凿 | záo |