ἤπειρον εἰς ἄπειρον ἐκβάλλων πόδα → departing to the limitless mainland
praerupte: a false read. for praealtus, Plin. 34, 15, 43, § 149; v. Sillig ad h. l.
praerupte. adv. :: Mons — altus 巉峻之山。