grit

Dictionary definition · grit

noun

a hard coarse-grained siliceous sandstone
fortitude and determination"he didn't have the guts to try it"

verb

cover with a grit"grit roads"
clench together"grit one's teeth"

Similar words

gritrock gritstone backbone gumption guts moxie sand

Source: Open English WordNet (CC BY 4.0).