αὐκτώριτας

From LSJ

σταγόνες ὕδατος πέτρας κοιλαίνουσιν → constant dropping wears away a stone, constant dripping will wear away the hardest stone, little strokes fell big oaks, constant dripping wears the stone, constant dropping wears the stone, constant dripping will wear away a stone

Source

Spanish (DGE)

lat. auctoritas, autoridad del Senado, D.C.55.3.4.