ἐμπρός
From LSJ
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)
Spanish (DGE)
1 adv. delante ἢ ἐ. ἢ ὀπίσω Paul.Aeg.6.118.1, Ps.Nonn.Comm.in Or.4.72, τὸ ὀστοῦν τὸ ἐ. ὄν Pall.in Hp.Fract.64.18.
2 prep. de gen. delante de ἐ. ἡμῶν Paul.Aeg.6.8.1.