ἐπιζυγίς
From LSJ
εἰ γάρ κεν καὶ σμικρὸν ἐπὶ σμικρῷ καταθεῖο καὶ θαμὰ τοῦτ᾽ ἔρδοις, τάχα κεν μέγα καὶ τὸ γένοιτο → for if you add only a little to a little and do this often, soon that little will become great (Hesiod W&D, 361-362)
English (LSJ)
ίδος, ἡ,
A iron pin upon which the strands of the torsion engine were wound, Ph.Bel.53.27, Hero Bel.83.5. II. cross beam,Apollod. Poliorc.172.7.