καιρουσσέων

From LSJ

οὐκ ἔστ' ἀλώπηξ ἡ μὲν εἴρων τῇ φύσει ἡ δ' αὐθέκαστος → foxes are not one of a treacherous nature and the other straightforward, the nature of foxes is not for one to be treacherous and the other straightforward

Source

Dutch (Woordenboekgrieks.nl)

καιρουσσέων ep. gen. plur. f. van καιρόεις.