Where does “nonsmile” come from?

nonsmile (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.

nonsmile (English): A facial expression that is not a smile

Definitions

  1. A facial expression that is not a smile

Ancestry of “nonsmile”, step by step

nonsmile 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 smile

StepLanguageWordMeaning
1EnglishsmileA facial expression comprised by flexing the...
2Middle Englishsmilento smile
3Old Norsesmīlato smile
4Proto-Germanicsmīlijanąto smile
5Proto-Indo-Europeansmēy-—
Every word from Proto-Indo-European óynos →Every word from Old Latin noenum →Every word from Latin nōn →