incompetent
    /ɪnˈkɑːmpətənt/ 
    
 
    
    adjective
    
    [more ~; most ~] :not competent: such as
    
    lacking necessary ability or skills
    
    
    
    
    
    
    
    b law :not able to take part in a trial
    
    
    
    
    
    noun
    
    plural -tents
    
    [count] :a person who is not able to do something well :an incompetent person