Marked by severity or intensity
She stared at her feet, gnawing on her lower lip.
A rat, he declared, was gnawing at the pit of his stomach.
One thought had been gnawing at her consciousness since the first time she suspected him of being involved in drugs.
She stared at him, a gnawing feeling beginning in her stomach that had nothing to do with hunger.
It is also fond of gnawing the bark of young trees, and thus often does great damage to plantations.