ποριστέον
From LSJ
πρῶτον μὲν οὖν ὄστρεια παρὰ Νηρεῖ τινι ἰδὼν γέροντι φυκί ἠμφιεσμένα ἔλαβον ἐχίνους τ' ἐστὶ γὰρ προοίμιον δείπνου χαριέντως ταῦτα πεπρυτανευμένου → So first I spotted oysters wrapped in seaweed at the shop of some old Nereus, and sea urchins, which I bought; these were the appetizers for a delightfully managed dinner
English (LSJ)
one must provide, Epicur.Fr. 481, Chrysipp.Stoic.3.172, Iamb.in Nic.p.58P.
Greek (Liddell-Scott)
ποριστέον: ῥημ. ἐπίθ., δεῖ πορίζειν, Σχόλ. εἰς Εὐρ. Ὀρ. 671.