Greek word
átaktos
ἄτακτος
What it means
unarranged, i.e. insubordinate
unarranged, i.e. (by implication) insubordinate (religiously)
Where it comes from
from A (Α) (as a negative particle) and a derivative of tássō (τάσσω)
How the King James translates it
Every place it appears 1
1 Thessalonians5:14