The headword is either masculine accusative singular or neuter nominative/accusative singular of this adjective; the latter if (as is reasonable to suppose) it is extracted from the quotation which follows.
[1] This passage, Polybius fr. 120 Büttner-Wobst, perhaps via Aelian, reappears in various forms at delta 584, epsilon 254, and epsilon 1102. Büttner-Wobst notes (p. 530) that Toup attributed the fragment to Polybius, but that, after Schweighäuser, it has been universally rejected. For a full study and reconstruction of the fragment, attributing it to book 30 of Diodorus Siculus, see Favuzzi (below).