ἐξαγγελτικός
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 conveying information, Arist.Pr.903a24. 2 expressive, c. gen., ὀνόματα τῶν θείων διακόσμων Procl.in Cra.p.72 P. 3 apt to tell tales, gossiping, Arist.Rh.1384b5.