precativus
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)
Latin > English (Lewis & Short)
prĕcātīvus: a, um, adj. precor,
I prayed for, obtained by entreaty (postclass.): pax, Amm. 17, 5, 1: precativo modo, by prayer or entreaty, Ulp. Reg. tit. 24.—Adv.: prĕcātīvē, by request, by entreaty (post-class.), Ulp. Reg. tit. 25, 1 al.
Latin > French (Gaffiot 2016)
prĕcātīvus, a, um (precor), de prière : precativo modo Ulp. Tit. 24, 1, sous forme de prière ; precativa pax Amm. 17, 5, 1, paix obtenue par prière.