[ἄτακτος] from G1 (as a negative particle) and a derivative of G5021; unarranged, i.e. (by implication) insubordinate (religiously)
Usages throughout the bible
1 Thessalonians 5:14
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Now we exhort you, brethren, warn them that are unruly, G813 comfort the feebleminded, support the weak, be patient toward all men.