Gnaw vs Knew - What's the difference?

As verbs the difference between gnaw and knew

is that gnaw is to bite something persistently, especially something tough while knew is (know).

To bite something persistently, especially something tough.

The dog gnawed the bone until it broke in two.

To produce excessive anxiety or worry.

Her comment gnawed at me all day and I couldn't think about anything else.

To corrode; to fret away; to waste.

* gnawer * gnawable

(head)

(know)