ἀκάτειος · akateios — LSJ
belonging to an, foremast
belonging to an ἄκατος, q. v.; esp. ἀ. ἱστός foremast, IG 2.793, etc.; ἀ. κεραία yard belonging thereto, ib., cf. Poll. 1.91.
II small sail, take to flight
Subst. ἀκάτειον, τό, (sc. ἱστίον) small sail, opp. τὰ μεγάλα ἱστία, X. HG 6.2.27, Epicr. 10 (with play on ἄκατος II), cf. Luc. Lex. 15, J.Tr. 46, Hist.Conscr. 45; ἄρασθαι τὸ ἀ., i.e. take to flight, prob. l. for ἀκάτιον in Epicur. Fr. 163, cf. Ar. Lys. 64.