word-forming element meaning "over, above, beyond, in addition," especially in words from Anglo-French and Old French, from Old French sour-, sor-, sur-, from Latin super "above, over," from PIE root *uper "over."
sur- (2)
assimilated form of sub- before -r-.
supra-nationalism
supremacist
supremacy
supreme
supremist
sur-
sura
surcease
surcharge
surcingle
surcoat