Use "gnaws" in a sentence

1. 6 While the dog gnaws bone, companions would be none. 

2. On land it is used for stability as the beaver gnaws away at trees.

3. Congolese Proverbs (66 Proverbs) The worm that gnaws on the bean is the one inside the bean

4. Discrimination is a hellhound that gnaws at Negroes in every waking moment of their lives.

5. The Agony of being so close to our goal but failing gnaws at our insides while we replay the events over and over in our heads