Spanish Etymology From super- + carretera. Pronunciation IPA(key): /supeɾkareˈteɾa/ [su.peɾ.ka.reˈt̪e.ɾa] Rhymes: -eɾa Syllabification: su‧per‧ca‧rre‧te‧ra Noun supercarretera f (plural supercarreteras) superhighwayWikiwand - on Seamless Wikipedia browsing. On steroids.