▪ cause others to recognize (one's authority or a right) by confident and forceful behaviour: "the good librarian is able to assert authority when required"Similarinsist onstand up forupholddefendcontendestablishpress/push forstress
▪ behave or speak in a confident and forceful manner:"it was time to assert himself"
Word Originearly 17th century: from Latin asserere ‘claim, affirm’, from ad- ‘to’ + serere ‘to join’.