gristi

Etymology
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Verb

 * 1)  to bite, gnaw, nibble
 * 2)  to corrode, erode, fret eat away at (gradually wear away by rubbing or chemically)
 * 3)  to annoy, bother, vex, rankle
 * 4)  to snap at, snarl at, rail at (another person due to annoyance)
 * 5)  to snack

Etymology
From.

Verb

 * 1) to bite