αἰνιγματωδῶς
From LSJ
βωμὸν Ἀριστοτέλης ἱδρύσατο τόνδε Πλάτωνος, ἀνδρὸς ὃν οὐδ' αἰνεῖν τοῖσι κακοῖσι θέμις → Aristotle had this altar of Plato set up — Plato, a man whom the wicked dare not even mention in praise
Russian (Dvoretsky)
αἰνιγμᾰτωδῶς: загадочно, в виде загадок Diog. L., Sext.
Spanish
de manera enigmática, enigmática, alegóricamente, oscuramente