συνθραύω
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)
A break in pieces, shiver, E.Or.1569, Plu.Arist.18; crumble, ἄρτον Gp.9.23.5:—Pass., X.Ages.2.14, Plb.8.5.11, etc.