Where does “nonsynchronous” come from?

nonsynchronous (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.

nonsynchronous (English): Not synchronous

Definitions

  1. Not synchronous

Ancestry of “nonsynchronous”, step by step

nonsynchronous 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 synchronous

StepLanguageWordMeaning
1EnglishsynchronousAt the same time, at the same frequency;...
2Latinsynchronuscontemporary, synchronic
3Ancient Greekσύγχρονοςcontemporary; synchronous; simultaneous;...
4Ancient Greekσῠν-together; with, together
5Ancient Greekσύνbeside, with
6Proto-Hellenic*ksúnbeside, with
Every word from Proto-Indo-European óynos