'Ruthless' in the Bible

I have seen ruthless evil men growing in influence, like a green tree grows in its native soil.

For foreigners attack me; ruthless men, who do not respect God, seek my life. (Selah)

My God, deliver me from the power of the wicked and the grasp of ruthless practicers of evil.

God, arrogant people have attacked me;a gang of ruthless men seeks my life.They have no regard for You.