Where does “nondrowsy” come from?

nondrowsy (English) comes from English non, from French non, from Old French non, from Latin nōn, from Old Latin noenum, from Proto-Indo-European óynos — one; single.

nondrowsy (English): Not causing drowsiness

Definitions

  1. Not causing drowsiness

Ancestry of “nondrowsy”, step by step

nondrowsy traces back through two separate lines of ancestry.

via English non

StepLanguageWordMeaning
1EnglishnonObsolete form of none
2Frenchnonno; not; a no, a negative response
3Old Frenchnonno; not; Alternative form of nom
4Latinnōnnot
5Old Latinnoenum—
6Proto-Indo-Europeanóynosone; single

via English drowsy

StepLanguageWordMeaning
1EnglishdrowsyInclined to drowse; heavy with sleepiness;...
2EnglishdrowseTo be sleepy and inactive; To nod off; to fall...
3Middle Englishdrousen—
4Old Englishdrūsan—
5Proto-Germanicdrūsijanąto look down; mourn
Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →