θηρευτέον
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)
English (LSJ)
A one must hunt after, Plb.1.35.8.
Greek (Liddell-Scott)
θηρευτέον: ῥημ. ἐπίθ. τοῦ θηρεύω, δεῖ θηρεύειν, Πολύβ. 1. 35, 8.