Where does “douăsprezece” come from?

douăsprezece (Romanian) comes from Romanian două, from Latin duae, from Latin duō, from Proto-Italic duō, from Proto-Indo-European dwóh₁ — two.

Ancestry of “douăsprezece”, step by step

StepLanguageWordMeaning
1Romaniandouătwo
2Latinduaenominative feminine plural of duo
3Latinduōtwo; 2
4Proto-Italicduōtwo
5Proto-Indo-Europeandwóh₁two
Every word from Proto-Indo-European dwóh₁ →Every word from Proto-Italic duō →Every word from Latin duō →