insubordinate
in-su-bor-di-nate
adjective
Refusing to obey authority; defiant and disobedient, especially in a hierarchical setting.
"The insubordinate employee was given a final warning."
Thesaurus
Synonyms: noncompliant, defiant, resistive, resistant, rebellious, unruly, mutinous, disobedient, contumacious
Antonyms: subordinate