Where does “vent-piece” come from?

vent-piece (English) comes from English vent, from French éventer, from Vulgar Latin *exventāre, from Latin ventus, from Proto-Italic wentos, from Proto-Indo-European h₂wéh₁n̥ts, from Proto-Indo-European h₂wḗh₁ti, from Proto-Indo-European h₂weh₁- — to blow.

vent-piece (English): In a breechloading firearm, a vertical sliding block with a conical plug on its front surface to seal the firing chamber and close the breech

Definitions

  1. In a breechloading firearm, a vertical sliding block with a conical plug on its front surface to seal the firing chamber and close the breech

Ancestry of “vent-piece”, step by step

vent-piece traces back through two separate lines of ancestry.

via English vent

StepLanguageWordMeaning
1EnglishventAn opening through which gases, especially air,...
2Frenchéventerto air, ventilate; to fan; to expose to the wind
3Vulgar Latin*exventāre
4Latinventusa wind; arrival
5Proto-Italicwentoswind
6Proto-Indo-Europeanh₂wéh₁n̥tsblowing; that which blows; the wind, air
7Proto-Indo-Europeanh₂wḗh₁tito blow
8Proto-Indo-Europeanh₂weh₁-to blow

via English piece

StepLanguageWordMeaning
1EnglishpieceA part of a larger whole, usually in such a form...
2Middle Englishpecepiece; morsel; bit
3Old Frenchpiecepiece, bit, part; circa 1170, Chrétien de Troyes
4Vulgar Latinpettiapiece, portion
5Latinpettiapiece, portion
6Gaulishpettyā
7Proto-Celtickʷezdispiece, portion
Every word from Proto-Indo-European h₂weh₁-Every word from Proto-Indo-European h₂wḗh₁tiEvery word from Proto-Indo-European h₂wéh₁n̥ts