ἀρρητοποιία
From LSJ
οὗτος μὲν ὁ πιθανώτερος τῶν λόγων εἴρηται, δεῖ δὲ καὶ τὸν ἧσσον πιθανόν, ἐπεί γε δὴ λέγεται, ῥηθῆναι → this is the most credible of the stories told; but I must relate the less credible tale also, since they tell it
Spanish (DGE)
-ας, ἡ
práctica de un vicio indecible, acción obscena αἰσχρουργίας καὶ ἀρρητοποιίας Eus.PE 6.6.53, cf. HE 2.13.7, τάς τε τῶν ἀρρένων ἀρρητοποιίας καὶ τὰς τῶν θηλειῶν Basil.Ep.160.3.