intractable
['balking ', 'balky ', 'refractory ', 'stubborn ', 'uncontrollable ', 'unmanageable ', 'unmalleable ', 'defiant ', 'noncompliant ', 'disobedient ', 'stubborn ', 'obstinate ', 'unregenerate ', 'unmanageable ', 'difficult ', 'wild ', 'untamed ', 'tractable ']