Etymology From in- + subordinate, on model of French insubordonné.
1
Rebellious or defiant to authority; contumacious.
I remembered with confusion my insubordinate and stealthy conduct, and when I saw where it had brought me […] I felt ashamed to look him in the face.1881–1882, Robert Louis Stevenson, Treasure Island, London; Paris: Cassell & Company, published 14 November 1883, →OCLC:
insubordinate
verb
Etymology From in- + subordinate, on model of French insubordonné.