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
εὔχορδος, -ον (Α)αυτός που έχει καλές χορδές, που ηχεί μελωδικά.