grit/ grɪt /

1.noun [u] 
(sand,gravel) 沙粒

2.noun
(determination) 勇气

3.vt.[+road] 
用沙子覆盖

4.n pl [US] [Cooking] 
grits 粗玉米粉

to grit one's teeth
 [lit] 咬紧牙
5.n pl [fig] 
咬紧牙关