Psalms 18:45

The strangers shall fade away -Hebrew, “The sons of the stranger.” That is, foreigners. The word rendered fade away -נבלnâbêl- means properly to wilt, wither, fall away, as applicable to flowers, leaves, or plants,Psalms 1:3;Psalms 37:2;Isaiah 1:30;Isaiah 28:1. Here it means that those foreign nations would diminish in numbers and in power, until they should wholly disappear. The idea is, that all his foes would vanish, and that he and his kingdom would be left in peace. And be afraid out of their close places -The word rendered be afraid means to tremble - as those do who are in fear.