Where does “nonsleepy” come from?

nonsleepy (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.

nonsleepy (English): Not sleepy

Definitions

  1. Not sleepy

Ancestry of “nonsleepy”, step by step

nonsleepy 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 sleepy

StepLanguageWordMeaning
1EnglishsleepyTired; feeling the need for sleep; Suggesting...
2Middle Englishslepysleepy liable to sleep
3Old English*slǣpiġ—
Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →