Where does “Doppel-T-Stein” come from?

Doppel-T-Stein (German) comes from German Doppel, from Middle Dutch dubbel, from French doublé, from Middle French double, from Old French doble, from Latin dūplus, from Proto-Italic *duplos — double.

Doppel-T-Stein (German): a kind of paving stone which is based on a cuboid form with a slim belly, like two letters T facing each other

Definitions

  1. a kind of paving stone which is based on a cuboid form with a slim belly, like two letters T facing each other

Ancestry of “Doppel-T-Stein”, step by step

Doppel-T-Stein traces back through 3 separate lines of ancestry.

via German Doppel

StepLanguageWordMeaning
1GermanDoppeldoubles; duplicate
2Middle Dutchdubbel
3Frenchdoublédouble, brace, pair; double; doublé
4Middle Frenchdouble
5Old Frenchdobledouble
6Latindūplusdouble (twice as much, or as big)
7Proto-Italic*duplosdouble

via German stein

StepLanguageWordMeaning
1Germansteinstone, rock
2Middle High Germansteinstone
3Old High Germansteinstone
4Proto-West Germanicstainstone
5Proto-Germanicstainazstone
6Proto-Indo-Europeansteyh₂-to stiffen
7Proto-Indo-Europeansteh₂-to stand

via German T

StepLanguageWordMeaning
1GermanT(on license plates of government cars)
Every word from Proto-Italic *duplos