'unentitled' originates from the prefix 'un-' meaning 'not' and the word 'entitled' from Old French 'entitler', which meant 'to give a title or right'.

'entitler' transformed into the Middle English word 'entitlen', and eventually became the modern English word 'entitle'.

Initially, 'entitle' meant 'to give a title or right', and 'unentitled' has retained the meaning of 'not having a right or claim'.