The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
uper
DEFINITION:
Over. Derivatives include over, sovereign, sirloin, soprano, and somersault. 1. Extended form *uperi.a.over, over-, from Old English ofer, over; b.orlop, from Middle Low German over, over. Both a and b from Germanic *uberi.2. Variant form *(s)uper.a.soubrette, sovereign, super-, superable, superior, supreme, supremo, sur-; sirloin, from Latin super,super-, above, over; b. suffixed form *(s)uper-no-.supernal, from Latin supernus, above, upper, top; c. suffixed form *super-bhw-o-, “being above” (*bhw-o-, being; see bheu-). superb, from Latin superbus, superior, excellent, arrogant; d. suffixed (superlative) reduced form *sup-mo-.sum1, summit, from Latin summus, highest, topmost; e. suffixed form *super-o-.sopranino, soprano, supra-; somersault, from Latin supr (feminine ablative singular), above, beyond. 3. Basic form *uper. hyper-, from Greek huper, over. (Pokorny upér 1105.)
-). superb, from Latin superbus, superior, excellent, arrogant; d. suffixed (superlative) reduced form *sup-mo-. sum1, summit, from Latin summus, highest, topmost; e. suffixed form *super-o-. sopranino, soprano, supra-; somersault, from Latin supr
(feminine ablative singular), above, beyond. 3. Basic form *uper. hyper-, from Greek huper, over. (Pokorny upér 1105.) 
