παραπρεσβεύω
From LSJ
Ἀναβάντα γὰρ εἰς τὴν ἀκρόπολιν, καὶ διὰ τὴν ὑπερβολὴν τῆς λύπης προσκόψαντα τῷ ζῆν, ἑαυτὸν κατακρημνίσαι → For he ascended the acropolis and then, because he was disgusted with life by reason of his excessive grief, cast himself down the height
English (LSJ)
A execute an embassy faithlessly or dishonestly, D.19.191, SIG167.5 (Mylasa, iv B.C.); πρεσβείαν π. Aeschin.2.94 :—more freq. in Med. παραπρεσβ-εύομαι, Pl.Lg.941a, Isoc.18.22 ; εἰς Αἴγυπτον D.24.127.
Greek (Liddell-Scott)
παραπρεσβεύω: ἐκτελῶ τὰ καθήκοντα πρεσβευτοῦ ἀπίστως ἢ ἐναντίον τῶν ὁδηγιῶν τῆς πόλεως, Δημ. 401. 4, Αἰσχίν. 40. 31· ―συνηθέστερον ὡς ἀποθ., παραπρεσβεύομαι, Πλάτ. Νόμ. 941Α, Ἰσοκρ. 375D· εἰς τόπον Δημ. 740. 17.