This meaning is about using teeth to bite something many times. Usually, small pieces are taken away. It is a simple action that animals and sometimes people do.
The dog gnawed the old shoe hard.
She gnawed a carrot for her snack.
This meaning shows damage to something because of biting or chewing for a long time. It can be objects or materials, not food.
The metal pipe was gnawed by the mice.
The old book’s pages were gnawed at the corners.
This is a figurative use. It means a feeling or thought keeps bothering someone inside. It is like a worry slowly eating their peace.
Fear gnawed at his heart all night.
Doubt gnawed her before the exam.
Here, it means to slowly take away power, strength, or resources. The process is gradual and harmful.
Debt gnawed away his savings slowly.
The cold gnawed at the hikers' strength.
This usage means a feeling like guilt or regret stays with a person and bothers them for a long time. It is stronger than simple worry.
Guilt gnawed him after the mistake.
Regret gnawed at her for years.
