To bite, as something hard or tough, which is not readily separated or crushed; to bite off little by little, with effort; to wear or eat away by scraping or continuous biting with the teeth; to nibble at.
To bite in agony or rage.
To corrode; to fret away; to waste.
To use the teeth in biting; to bite with repeated effort, as in eating or removing with the teethsomething hard, unwiedly, or unmanageable.
It's really hard when people write nasty things about you all the time. As much as good things are said about you, it's always those one or two bad comments that really stay with you and gnaw at you. I try not to read that stuff if I can. Jordin Sparks