tread
- n. 踏；胎面；步态；鞋底；踏板；梯级
- vt. 踏；踩；践踏；跳；踩出
- vi. 踏；踩；行走；交尾
英英释意
- 1. a step in walking or running
- 2. the grooved surface of a pneumatic tire
- 3. the part (as of a wheel or shoe) that makes contact with the ground
- 4. structural member consisting of the horizontal part of a stair or step