meaning unsure, possibly: = action by which animals nibble on a hard object such as a bone to get nourishment out of it
to gnaw
Impact
literally: (pains) gnaw (on someone); hence: = process by which humans experience a chronic or recurring pain, compared to a dog gnawing on a bone for an extended period of time
to torment
Move
meaning unsure; possibly: = action by which humans move from place to place in search of something