> Diccionario etimológico vasco español

Correr, verter. Raíz proto-vasca *sur. Cp. kartvelo tsur "id.", uralo-altaico sur, sür "id.", dravídico sor, sur, tsor, tsur "correr, verter".

Couler, verser. Racine proto-basque *sur. Cp. kartvèle tsur "couler", ouralien sur, altaïque sür "id.", dravidien sor, sur, tsor, tsur "couler".

To flow. Proto-basque stem *sur. Cp. kartvelian tsur "to ooze, flow", uralic sur, altaic sür "id.", dravidian sor, sur, tsor, tsur "to flow".