Gnaw

The gnaw of his teeth on the pen cap was distracting to his colleagues.

The gnaw of regret was palpable as he looked back on his mistakes.

The gnaw of boredom made her day seem endless.

The gnaw of insecurity about her appearance affected her self-esteem.

The gnaw of regret over her past decisions haunted her for years.

The gnaw of guilt consumed him after he lied to his friend.

He couldn't escape the gnaw of uncertainty that lingered over him all day.

The gnaw of jealousy over her colleague's success was hard to shake off.

She felt the gnaw of guilt after lying to her parents about her whereabouts.

The gnaw of jealousy consumed her every time she saw her ex with someone else.

The gnaw is commonly known to be a pest in many households.

A gnaw can easily chew through wooden objects.