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
-έω, Α τεῖχος1. τειχίζω, χτίζω τείχος2. οχυρώνω τοποθεσία.