καταβατός
From LSJ
τοῖς οἰκείοις βουλεύμασιν ἁλίσκεσθαι → hoist by one's own petard, hoist with one's own petard, hoist on one's own petard, hoisted by one's own petard, be hoist with one's own petard
English (LSJ)
ή, όν,
A descending, steep, ὁδός Sch.A.R. 2.353, cf. Porph.Antr.23; v. καταιβατός. II καταβατόν, τό, = σελίς, Hdn.Epim.2, 122, cf. Hsch. s.v. σελίς.