From Proto-Italic *ruðēō, from Proto-Indo-European *h₁rudʰéh₁ti (“to be red”), from the root *h₁rewdʰ- (“red”).
rubeō (present infinitive rubēre, perfect active rubuī); second conjugation, no passive, no supine stem
- I am red or ruddy.
- (of persons) I am blushing (as a sign of shame, modesty, or joy)
- This verb has only limited passive conjugation; only third-person passive forms are attested in surviving sources. The third principal part is shared with rubēscō.
- rubeo in Charlton T. Lewis and Charles Short, A Latin Dictionary, Oxford: Clarendon Press, 1879
- rubeo in Charlton T. Lewis, An Elementary Latin Dictionary, New York: Harper & Brothers, 1891
- rubeo in Gaffiot, Félix, Dictionnaire illustré Latin-Français, Hachette, 1934