'Desolation' in the Bible

Meet him doth desolation -- he knoweth not, And his net that he hid catcheth him, For desolation he falleth into it.

And He doth cause me to come up From a pit of desolation -- from mire of mud, And He raiseth up on a rock my feet, He is establishing my steps.

And they who for desolation seek my soul, Go in to the lower parts of the earth.

How have they become a desolation as in a moment, They have been ended -- consumed from terrors.