μαστιχάω
From LSJ
νεκρὸν ἐάν ποτ' ἴδηις καὶ μνήματα κωφὰ παράγηις κοινὸν ἔσοπτρον ὁρᾶις· ὁ θανὼν οὕτως προσεδόκα → whenever you see a body dead, or pass by silent tombs, you look into the mirror of all men's destiny: the dead man expected nothing else | if you ever see a corpse or walk by quiet graves, that's when you look into the mirror we all share: the dead expected this
English (LSJ)
A gnash the teeth, Ep. dat. part. μαστιχόωντι Hes.Sc. 389:—Med., gloss on μασταρίζειν, Hsch.
Greek (Liddell-Scott)
μαστῐχάω: (μάσταξ;) τρίζω τοὺς ὀδόντας, μόνον ἐν Ἡσ. Ἀσπ. Ἡρ. 389, Ἐπ. δοτ. μετοχ. μαστιχόωντι ἀντὶ μαστιχῶντι· πρβλ. μασταρύζω.