αἰπεινός · aipeinos — LSJ
high, lofty, of cities on heights, Ἴλιον Il. 9.419, al., cf. A. Fr. 284, S. Tr. 858 (lyr.), Ph. 1000; αἰθήρ B. 8.34; of Delphi, μαντεῖα E. Ion 739; of mountain-tops, κάρηνα Il. 2.869, Od. 6.123.
metaph.,
αἰ. λόγοι hasty, wicked words, Pi. N. 5.32.
hard to reach, σοφίαι μὲν αἰ. Id. O. 9.108.