ἀτακτέω
From LSJ
Ὅρκον δὲ φεῦγε καὶ δικαίως κἀδίκως (κἂν δικαίως ὀμνύῃς) → Iurare fugias, vere, falso, haud interest → Zu schwören meide, gleich ob richtig oder falsch
English (LSJ)
of a soldier,
A to be undisciplined, opp. εὐτακτέω, X.Cyr. 7.2.6, D.3.11; τοὺς ἀτακτοῦντας τῶν τριηράρχων IG2.809b13:—Pass., πολλὰ γὰρ ἠτάκτητο αὐτοῖς J.AJ17.10.10: generally, neglect one's duty, fail to discharge obligation, PEleph.2.13(iii B. C.), 2 Ep.Thess.3.7, POxy.275.24(i A. D.). 2 generally, lead a disorderly life, Lys. 14.18, X.Oec.7.31: c. gen., τῆς πατρίου ἀγωγῆς to desert it, Plu.2.235b. 3 raise a riot or rebellion, OGI200.6 (iv A. D.).