ἀντᾴδω
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)
A sing in answer, esp. of the partridge, answer when another calls, ἀ. ὡς μαχούμενος Arist.HA614a11, cf. Mir.845b25, Ael.NA4.16; ἀ. Μούσαις Luc.Pisc.6; τοῖς φθεγγομένοις Plu.2.794c; cry out at one, ἐγὼ δ', ἢν τοῦτο δρᾷς, ἀντᾴσομαι Ar.Ec.887:—Pass., στροφῇ ἀντᾳσθῆναι Poll.4.112.