An Etymological Dictionary of the German Language/Annotated/nun
nun, adverb, ‘now, at present,’ from Middle High German and Old High German nu (with the variant nû), ‘at the present time, now,’ rarely in Middle High German with the adverbial suffix n (nun, nuon). Further in Modern High German nu (from Middle High German n); corresponding to Old Saxon nū̆, Dutch nu, Anglo-Saxon nū̆, English now, Gothic nū̆, ‘now.’ A common Teutonic temporal adverb; compare Sanscrit nu, nû, ‘now,’ nûnam, ‘now,’ Greek νύ, νῦν, Latin nunc (with the c of hi-c), Old Slovenian nyně, ‘now,’ Lithuanian nu. Compare neu and noch (1).