Meaning

noun Roman goddess of night; daughter of Erebus; counterpart of Greek Nyx

originEtymology tree Proto-Indo-European *nókʷts Proto-Italic *nokts Latin noxlbor. English nox Learned borrowing from Latin nox, from Proto-Italic *nokts, from Proto-Indo-European *nókʷts.

Etymology from Wiktionary, CC BY-SA 3.0