ἄκαινα
From LSJ
ξένῳ δὲ σιγᾶν κρεῖττον ἢ κεκραγέναι → it's better for a stranger to keep silence than to shout (Menander)
English (LSJ)
ης, ἡ, (ἀκή A, ἀκίς)
A spike, prick, goad, A.R.3.1323, AP6.41 (Agath.). II ten-foot rod used as a measure, ἄκαιναν ἀμφότερον κέντρον τε βοῶν καὶ μέτρον ἀρούρης Call.Fr.214, cf. Sch.A.R. l.c. 2 square measure of 100 ft., in Egypt, Hero *Deff.130, cf. Sch. A.R.l.c., POxy.669.41 (? iii A. D.); in Bithynia, BCH27.318:— also ἄκαινον, τό, Olymp. in Mete43.1.
German (Pape)
[Seite 67] ἡ (ἀκή), Spitze, Stachel, Ap. Rh. 3, 1323. – Ein Längenmaß von 10 Fuß, Sp.