דָּאג

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

Source

English (Strong)

or (fully) dag (Nehemiah 13:16); from דָּגָו; a fish (as prolific); or perhaps rather from דָּאַג (as timid); but still better from דָּאַג (in the sense of squirming, i.e. moving by the vibratory action of the tail); a fish (often used collectively): fish.