I.forbidden, ἀπόρρητον πόλει though it was forbidden to the citizens, Soph.; τὰ ἀπόρρητα prohibited exports, contraband articles, Ar.
II.not to be spoken, that should not be spoken, Lat. tacendus, ἀπ. ποιεῖσθαι to keep secret, Hdt.; κύριος καὶ ῥητῶν καὶ ἀπορρήτων, of Philip, like dicenda tacenda, Dem.: ἀπόρρητον, ου, τό, a state-secret, Ar.
2.of sacred things, ineffable, Eur.
3.unfit to be spoken, abominable, Plat.