ἐπιδιαβαίνω

A. cross over after another, Hdt. 4.122, 6.70; ἐ. τάφρον Th. 6.101; [ποταμόν] X. HG 5.3.4, etc.; ἐ. ἐπί τινα, τινί, cross a river to attack an enemy, force the passage, Plb. 3.14.8, Str. 2.5.8, cf. D.C. 60.21.
II. . pass all bounds, ταῖς ἐλπίσιν J. AJ 15.7.9.
2. . spread, of diseases, ἄχρι τῆς καρδίας Gal. 8.297; ἐπὶ γόνατα Aët. 12.2.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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