Where does “nightlessness” come from?

nightlessness (English) comes from English nightless, from English night, from Middle English nyght, from Middle English nighte, from Old English nyht, from Proto-West Germanic naht, from Proto-Germanic nahts, from Proto-Indo-European nókʷts — bare, naked.

nightlessness (English): Absence of night

Definitions

  1. Absence of night

Ancestry of “nightlessness”, step by step

nightlessness traces back through two separate lines of ancestry.

via English nightless

StepLanguageWordMeaning
1EnglishnightlessWithout night
2EnglishnightThe period between sunset and sunrise, when a...
3Middle EnglishnyghtAlternative form of nighte; Alternative form of...
4Middle Englishnightenight
5Old EnglishnyhtAlternative form of niht
6Proto-West Germanicnahtnight
7Proto-Germanicnahtsnight
8Proto-Indo-Europeannókʷtsnight
9Proto-Indo-Europeannegʷ-bare, naked

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European negʷ-
nightlessness — Etymology, Origin & Word History | Etymology Explorer