Simple past tense and past participle of grit.(verb)
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Use "gritted" in a sentence
"For several minutes, Gus and Matilda had to talk to him, in an effort to distract him from the burning; at one point, they thought they might have to restrain him, but Call gritted his teeth and let the little woman do her work."
"The alarm was momentary, for a familiar voice said, as the point of a sword gritted in the sand at the speaker's feet --"
""All were amazed that this road was not gritted, which is a regular road used by those who go to see the Christmas lights.""