Where does “roboretum” come from?

roboretum (Medieval Latin) comes from Latin rōbur, from Latin ruber, from Proto-Italic ruðros, from Proto-Indo-European h₁rudʰrós, from Proto-Indo-European h₁rewdʰ- — red.

Ancestry of “roboretum”, step by step

StepLanguageWordMeaning
1Latinrōburan oak tree
2Latinruberred approximately like red ochre (which had a traditional status among the Romans); red that was both common and dignified, somewhat associated with pigment
3Proto-Italicruðrosred
4Proto-Indo-Europeanh₁rudʰrósred
5Proto-Indo-Europeanh₁rewdʰ-red

Words derived from “roboretum”

Every word from Proto-Indo-European h₁rewdʰ- →Every word from Proto-Indo-European h₁rudʰrós →Every word from Proto-Italic ruðros →