presumptuous

/prɪˈzʌmptʃuəs/
adjective
  1. Behaving in a way that is too confident or bold, especially by doing things that one has no right to do.
    • I don't want to be presumptuous, but could I offer you some advice?
    • It was presumptuous of him to assume he would be invited to the wedding.
    • She made a presumptuous comment about her boss's personal life.
Antonyms