Where does “dubbeldoor” come from?

dubbeldoor (Afrikaans) comes from Dutch door-, from Dutch door, from Middle Dutch dōre, from Old Dutch thuro, from Proto-Germanic þurhw, from Proto-Indo-European tr̥h₂kʷe, from Proto-Indo-European terh₂- — to cross over, pass through, overcome.

Ancestry of “dubbeldoor”, step by step

StepLanguageWordMeaning
1Dutchdoor-Prepended to verbs; denotes that action goes...
2Dutchdoorthrough; across, around; because of, due to
3Middle Dutchdōrethrough
4Old Dutchthurothrough
5Proto-Germanicþurhwthrough
6Proto-Indo-Europeantr̥h₂kʷe—
7Proto-Indo-Europeanterh₂-to cross over, pass through, overcome
Every word from Proto-Indo-European terh₂- →