Level 5 · word 8,398 of 20,000
underside
/ˈʌndərˌsaɪd/
American

- n. 下面, 底面
- Definition
- n. the bottom or lower surface of something
- Example
- There was rust forming on the underside of the old car.
- 那辆旧车的底部正在生锈。