ἀ-τακτος, -ον (τάσσω), [in LXX: 3Ma.1:19 * ;] out of order, out of place (Lat. inordinatus), frequently of soldiers not keeping the ranks, or an army in disarray (cf. 3Ma.1:19); hence, metaphorically, irregular, disorderly (see previous word): 1Th.5:14.† (AS)
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G813 — ἄτακτος
ataktos · disorderly · Greek