Knaws vs Gnaws - What's the difference?

As verbs the difference between knaws and gnaws

is that knaws is (knaw) while gnaws is (gnaw).

(head)

(knaw)

* *

(en)

(en verb)

(head)

(gnaw)

* *

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