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)
Perhaps APers. *uvaršan, of good virility, strength, fr. APers. u, good, Av. hu, Skt. su + *varšan, Skt. vr̥šan, that which is distinguished for virility or strength.
