An Etymological Dictionary of the German Language/Annotated/außen

by Friedrich Kluge

außen, adverb, ‘outside, out of doors, without,’ from Middle High German ûȥen, Old High German ûȥana, ûȥân, adverb, preposition, ‘out of doors, outside, out, without’; corresponding to Anglo-Saxon ûton, adverb, ‘from without,’ Gothic ûtana, adverb, preposition, ‘from without, outside, out’; from Old Teutonic ût. See aus.