δᾶ
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)
expld. by the Sch.A.Ag.1072, EM60.8 as Dor. for γᾶ, γῆ, in Trag. (lyr.) φεῦ δᾶ, E.Ph.1296, Ar.Lys.198;
A οἰοῖ δᾶ φεῦ A.Eu.874; ἄλευ' ἆ δᾶ Id.Pr.567; ὀτοτοτοτοῖ ποποῖ δᾶ Id.Ag.1072; οὐ δᾶν no by earth, Theoc.4.17 (v.l. γᾶν):—prob. an exclamation of horror.
German (Pape)
[Seite 513] dor. = γᾶ, γῆ, voc. φεῦ Δᾶ Eur. Phoen. 1304; so sagt die Lacedämonierin bei Ar. Lys. 198; vgl.Aesch. Prom. 568 Eum. 841; οὐ δᾶν, nein bei der Erde, Theocr. 4, 17.