ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
ἐμπίπτω, ἔνδοθεν, ἔνδω, εἴσω, ἐντός, ἐν, ἔνδοι, ἔνδος, ἔνδον, ἔνδοθι
