Where does “nonplausible” come from?

nonplausible (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.

nonplausible (English): Not plausible

Definitions

  1. Not plausible

Ancestry of “nonplausible”, step by step

nonplausible 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 plausible

StepLanguageWordMeaning
1EnglishplausibleSeemingly or apparently valid, likely, or...
2Latinplausibilisplausible; praiseworthy; acceptable
3Latin-bilis-ble
4Proto-Italic-ðlisForms adjectives from verb stems indicating capacity or worth of being acted on
5Proto-Indo-European-dʰlis
6Proto-Indo-European-dʰlomAlternative form of *-trom; instrumental suffix;...
Every word from Proto-Indo-European óynosEvery word from Old Latin noenumEvery word from Latin nōn