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
SourceEnglish (Strong)
a primitive root; to select; also (as denominative from בָּר) to feed; also (as equivalent to בָּרַר) to render clear (Eccl. 3:18): choose, (cause to) eat, manifest, (give) meat.