χήνεος
From LSJ
τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)
German (Pape)
[Seite 1353] ion. statt χήνειος, κρεῶν βοέων καὶ χηνέων πλῆθος Her. 2, 37, wo es Andere für den gen. plur. von χήν erklären.
Greek (Liddell-Scott)
χήνεος: -α, -ον, Ἰων. ἀντὶ χήνειος.