Where does “roborate” come from?
roborate (English) comes from Latin rōborāre, from Latin rōbur, from Latin ruber, from Proto-Italic ruðros, from Proto-Indo-European h₁rudʰrós, from Proto-Indo-European h₁rewdʰ- — red.
roborate (English): to strengthen, fortify
Ancestry of “roborate”, step by step