κατακοντίζω
From LSJ
Τὸ νικᾶν αὐτὸν αὑτὸν πασῶν νικῶν πρώτη τε καὶ ἀρίστη. Τὸ δὲ ἡττᾶσθαι αὐτὸν ὑφ' ἑαυτοῦ πάντων αἴσχιστόν τε ἅμα καὶ κάκιστον. → Τo conquer yourself is the first and best victory of all, while to be conquered by yourself is of all the most shameful as well as evil
English (LSJ)
Att. fut. -ιῶ, used also by Hdt.9.17:—
A shoot down, Id. l.c., Th.8.108, D.18.151, LXXJu.1.15: pf. inf. Pass. κατηκοντίσθαι Phld.Piet.34; θηρία -όμενα Luc.Tox.59.