Where does “nonnocturnal” come from?
nonnocturnal (English) comes from English nocturnal, from Middle French nocturnal, from Latin nocturnālis, from Latin nocturnus, from Latin Nox, from Proto-Italic nokts, from Proto-Indo-European nókʷts, from Proto-Indo-European negʷ- — bare, naked.
nonnocturnal (English): Not nocturnal
Ancestry of “nonnocturnal”, step by step