v.1. To bite or chew on something, removing small pieces of it a bit at a time: The mice gnawed at the corner of the box until they had made a small hole in it.
2. To cause someone or something to have or feel persistent discomfort, anxiety, or guilt: His harsh criticism gnawed at me the rest of the day. Hunger was gnawing at my stomach.
v.1. To bite or chew something a bit at a time: The fox gnawed the tough meat away first, and then bit into the bone.
2. To bite or chew on something repeatedly in order to grind it down or to remove small pieces from it a bit at a time: The kids gnawed away at the cobs of fresh corn. That dog will gnaw away at that bone until it gets to the marrow inside.
3. To cause someone or something to have or feel persistent discomfort, anxiety, or guilt: Dark thoughts gnawed away at my mind.
v.1. To bite or chew on something, either without eating it or removing small pieces of it a bit at a time: The dog has been gnawing on that bone for days.
2. To cause someone or something to have or feel persistent discomfort, anxiety, or guilt: Unpleasant dreams gnawed on me all night and I couldn't sleep.