Where does “intrados” come from?

intrados (English) comes from French intradossé, from French dos, from Old French dos, from Vulgar Latin dossum, from Latin dorsum, from Proto-Italic dorsom.

intrados (English): The inner curve of an arch or vault

Definitions

  1. The inner curve of an arch or vault

Ancestry of “intrados”, step by step

intrados traces back through two separate lines of ancestry.

via French intradossé

StepLanguageWordMeaning
1Frenchintradossé—
2Frenchdosback; backs; backstroke
3Old Frenchdosback
4Vulgar Latindossum—
5Latindorsumback, part of the body between the neck and...
6Proto-Italicdorsom—

via Catalan dos

StepLanguageWordMeaning
1Catalandostwo; torre; One of a pair of castellers in the...
2Latinduōs—
3Proto-Italicduōtwo
4Proto-Indo-Europeandwóh₁two
Every word from Proto-Italic dorsom →Every word from Latin dorsum →Every word from Vulgar Latin dossum →