Derivational etymology, requiring several formal changes. It seems to have arisen from a misunderstanding of Philoxenus' etymology as it is found in Orion (Etymologicum, delta, p. 49): Δάκνω. παρὰ τὸ καίνω, ἐν συγκοπῇ κνῶ, καὶ ἐν συνθέσει δάκνω· τὸ σφόδρα καίνω. δύναται καὶ παρὰ τὸ κνῶ. Orion does not say explicitly that δάκνω is a compound with the intensive δα- as its first member. He only says "in composition" (ἐν συνθέσει), but leaves the first member in the dark. This may have led a copyist to design an etymology from the same καίνω, without δα- because it was not mentioned in Orion.