Or

Selon le Dictionnaire Anglo-Saxon :

This form occurs in A. Sax. only as a prefix, but in Goth.

or

us, in Icel. or, ur, in O. H. Ger. ur it is found also as a preposition. It has the meaning without, e. g. or-mód ; also that of original, early, e. g. or-eald. or