grit

n. 砂砾,粗砂石
v. 覆以砂砾

The soldiers are hard grit.

士兵们全都是刚强勇敢的。

Grit is spread on roads to make them less slippery in icy weather.

在结冰的天气，在路上撒上砂砾心免路面太滑。