The world.. is (or, 'shall be') stablished] see Psalms 75:3; Psalms 82:5. God's rule is the security of all moral order in the world.
3, 4. The floods and waves are emblems of the heathen nations.
Related Commentaries of Psalms 93:1
Psalms 93:1
1 The LORD reigneth, he is clothed with majesty; the LORD is clothed with strength, wherewith he hath girded himself: the world also is stablished, that it cannot be moved.