Gnaws

People talk sometimes of a bestial cruelty, but that's a great injustice and insult to the beasts; a beast can never be so cruel as a man, so artistically cruel. The tiger only tears and gnaws, that's all he can do. He would never think of nailing people by the ears, even if he were able to do it.

The dog gnaws the bone because he cannot swallow it.

Anxiety gnaws at us.

Here is the evil that gnaws at the human race.