ἄτακτος

Etymology
From.

Adjective

 * 1)   Not in battle-order.
 * 2) Not at one's post.
 * 3) Undisciplined, disorderly; irregular; casual.
 * 4) Irregular, inordinate.
 * 5)  Without rhythm.
 * 6)  Irregular.
 * 7) Uncivilized, lawless.
 * 8)  Indeterminate, not admitting of a definite solution.