'Gnaw' in the Bible

They are gaunt with want and famine; They gnaw the dry ground, in the gloom of wasteness and desolation.

In the night season my bones are pierced in me, And the pains that gnaw me take no rest.

Thou shalt even drink it and drain it out, and thou shalt gnaw the sherds thereof, and shalt tear thy breasts; for I have spoken it, saith the Lord Jehovah.