ἐν πέτροισι πέτρον ἐκτρίβων → by grinding stone against stones
ἔκκρουστος, ἐλατός, ἔκμακτος, ἔμπαισμα, ἀπότυψις, ἔμπαιστος, ἀπότυπος, ἐντορευτός
