ἄκερσος

From LSJ

χαῖρ', ὦ μέγ' ἀχρειόγελως ὅμιλε, ταῖς ἐπίβδαις, τῆς ἡμετέρας σοφίας κριτὴς ἄριστε πάντων → all hail, throng that laughs untimely on the day after the festival, best of all judges of our poetic skill

Source

Spanish (DGE)

-ον
sin esquilar de las ovejas ἀπὸ τῶν θηλείων ἔστιν ἄκ[ερ] σος PMasp.141.3re.11 (VI d.C.) en BL 4.14.