The term 'not competent' can be described by three words: 'UNABLE', 'INEPT', and 'UNFIT'. All three words mean that someone is not capable of doing something, either due to a lack of skill or knowledge. 'UNABLE' implies that the person is physically or mentally UNABLE to do something, while 'INEPT' suggests that the person lacks the necessary skills or knowledge to do something. Finally, 'UNFIT' implies that the person is not suitable for a particular task or job.