permanente
From LSJ
μὴ ἐν πολλοῖς ὀλίγα λέγε, ἀλλ΄ ἐν ὀλίγοις πολλά → don't say little in many words, but much in a few words (Stobaeus quoting Pythagoras)
Spanish > Greek
διάμονος, διατελής, διηνεκής, δυσαλλοίωτος, δυσκίνητος, ἀνελλιπής, ἀπαρόδευτος, ἐμμενετός, ἐμπαράμονος, ἔμμονος