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Adjective: insubordinate  ,in-su'bor-du-nut or ,in-su'bord-nut
  1. Disposed to or engaged in defiance of established authority
    - resistant, resistive
  2. Not submissive to authority
    "a history of insubordinate behaviour"; "insubordinate boys"

See also: contumacious, defiant, disobedient, mutinous, noncompliant, rebellious, unruly

Antonym: subordinate