ξίφη

From LSJ

ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones

Source

Greek (Liddell-Scott)

ξίφη: ἡ, «ξίφαι· τὰ ἐν ταῖς ῥυκάναις δρέπανα, ἢ σιδήρια» Ἡσύχ.