G0812
ἀτακτέω
be idle
ἀτακτέω -ῶ (ἄτακτος), primarily, of soldiers marching, to be out of order, to quit the ranks; hence, metaphorically, to be remiss, fail in the performance of duty (in π., of truancy on the part of an apprentice): 2Th.3:7 (on ἀ. and its cognates, see M, Th., 152 ff.; MM, s.vv.).† (AS)
Full Thayer's lexicon entry
ἀτακτέω — ataktéō
ἀτακτέω, ἀτάκω: 1 aorist ἠτάκτησα; "to be ἄτακτος, to be disorderly";
a. properly, of soldiers marching out of order or quitting the ranks: Xenophon, Cyril 7, 2, 6, etc. Hence,
b. to be neglectful of duty, to be lawless: Xenophon, Cyril 8, 1, 22; oec. 5, 15; Lysias 141, 18 (i. e.
c. Alcib. or. 1 § 18), others,
c. to lead a disorderly life: 2 Thessalonians 3:7,cf. 11.
1 occurrence