tread

中文： 步态、脚步声、踏面

1. A step taken with the foot.
2. A manner of stepping.
3. The sound made when someone or something is walking.
4. A walking surface in a stairway on which the foot is placed.
5. The grooves carved into the face of a tire, used to give the tire traction.
6. The grooves on the bottom of a shoe or other footwear, used to give grip or traction.
7. The chalaza of a bird's egg; the treadle.
8. The act of avian copulation in which the male bird mounts the female by standing on her back.

复数 treads