Τοὺς δούλους ἔταξεν ὡρισμένου νομίσματος ὁμιλεῖν ταῖς θεραπαινίσιν → He arranged for his male slaves to have sex with female slaves at a fixed price (Plutarch, Life of Cato the Elder 21.2)
clandestine: P. and V. λαθραῖος, κρυφαῖος (Plato), V. κρύφιος.
abstruse: P. and V. ἀσαφής, ἄδηλος, αἰνιγματώδης, V. δυσμαθής, ἄσημος; see dark.