κατακεράννυμι
From LSJ
προγράψαντες οὖν τά τε θεωρήματα καὶ τὰ ἐπιτάγματα τὰ χρεῖαν ἔχοντα εἰς τὰς ἀποδείξιας αὐτῶν μετὰ ταῦτα γραψοῦμές τοι τὰ προκείμενα → having therefore written at the beginning the theorems and the postulates that are necessary for their proofs, we will then write out for you the propositions
English (LSJ)
A mix, temper, in Pass., Arist.Pr.949a38, Sor.1.53, Plu.2.132d:—Act., dilute, weaken, δριμύτητα Dsc.5.11; cf. κατακίρνημι:— also κατακεραννύω, Poll.10.149.