Where does “nonvalved” come from?

nonvalved (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.

nonvalved (English): Not valved

Definitions

  1. Not valved

Ancestry of “nonvalved”, step by step

nonvalved 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 valved

StepLanguageWordMeaning
1EnglishvalvedHaving valves; simple past tense and past...
2EnglishvalveA device that controls the flow of a gas or fluid...
3Latinvalvadouble or folding door; one leaf of such doors
4Proto-Italic*wolVwā-
5Proto-Indo-European*wol-ew-o-
Every word from Proto-Indo-European óynosEvery word from Old Latin noenumEvery word from Latin nōn