An Etymological Dictionary of the German Language/Annotated/lugen

by Friedrich Kluge

lugen, verb, ‘to look out, spy,’ from the equivalent Middle High German luogen, Old High German luogên; corresponding to Old Saxon lôcôn, Anglo-Saxon lôcian, English to look, with an abnormal k for g. From these Norman luquer is borrowed. The early history of this West Teutonic stem lôkai, lôgai-, is obscure.