re·cal·ci·trant (rɪˈkæl sɪ trənt)
Marked by stubborn resistance to and defiance of authority or guidance. Unruly.
Hard to deal with, manage, or operate.
A recalcitrant person.
[Late Latin recalcitrns, recalcitrant-, present participle of recalcitrre, to be disobedient, from Latin, to deny access : re-, re- + calcitrre, to kick (from calx, calc-, heel).]
re·calci·trance, re·calci·tran·cy | n