eş: des Nachts, nachtüber, zwischen Uhlenflucht und Hahnenkraht
zıt: tags, tagsüber, über Tag, am Tag, morgens, mittags
köken: From Middle High German nahtes, from Old High German nahtes, equivalent to the adverbial solidified genitive of Nacht (“night”), analogical form to tags. Cognate with English nights (adverb).
köken: Uncertain. Maybe from Proto-Indo-Aryan *aktúṣ, from Proto-Indo-Iranian *aktúš, an ablaut variant of Proto-Indo-European *nokʷt-ú-s (“night”); compare, though with potential phonetic and semantic issues, Ancient Greek ἀκτίς (aktís, “ray, beam”). Both the Greek and Sanskrit words are traditionally assigned to a root *h₂ek-t- (“ray, beam”), but this fails to explain the “night” and related senses…