grind
From LSJ
English > Greek (Woodhouse)
verb transitive
sharpen: Ar. and V. θήγειν, Ar. and P. ἀκονᾶν (Xen.).
grind one's teeth: Ar. πρίειν τοὺς ὀδόντας.
grind against, verb intransitive: P. τρίβεσθαι πρός (acc.).
grind down: met., Ar. and P. ἐπιτρίβειν; see ruin.