grind|grinding|grinds

我们需要把胡椒粒磨碎以便调味。

We need to ___grind the peppercorns to season the dish.

咖啡师正在研磨新鲜的咖啡豆。

The barista is ___grinding fresh coffee beans.

她晚上磨牙。

She ___grinds her teeth at night.