adjective

refusing to obey rules or someone in authority.

Larry was stern with disobedient employees

insubordinate,unruly,wayward,errant,badly behaved,disorderly,delinquent,disruptive,troublesome,rebellious,defiant,mutinous,recalcitrant,refractory,uncooperative,non-compliant,wilful,unbiddable,intractable,obstreperous,awkward,difficult,perverse,contrary,naughty,mischievous,impish,roguish,rascally,bolshie,contumacious