The dog gnawed on a bone
Doubts were gnawing at him
how to gnaw their way through zipties.
to gnaw: roer, morder, mordisquear, masticar.. Morder o masticar algo de manera repetida y persistente. || Uso figurado: Sentimientos o pensamientos: Cuando se dice que una idea o emoción “gnaws at someone”, significa que preocupa, inquieta o atormenta de forma constante.