tread

这条轮胎的胎面花纹很独特。

The tire has a unique ___tread pattern.

不要在草地上踩踏，以免伤害植物。

Don't ___tread on the grass to avoid damaging the plants.

他轻手轻脚地走上楼梯，几乎没有发出脚步声。

He walked up the stairs with a light ___tread, barely making any sound.