Dictionary entry

ἀτακτέω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

* ἀτακτέω, -ῶ

(< ἄτακτος),

primarily, of soldiers marching, to be out of order, to quit the ranks; hence, metaph., to be remiss, fail in the performance of duty (in π., of truancy on the part of an apprentice): II Th 3:7 (on ἀ. and its cognates, v. M, Th., 152 ff.; MM, s.vv.).†