Focus on the pronunciation of assert
English definition of “assert”
/əˈsɜrt/ v [T]
› to state an opinion or claim a right forcefully: [+ that clause] The companies have asserted that everything they did was appropriate. › To assert is also to behave in a way that shows power, authority, or control: Several members of Congress called upon the president to assert leadership. › If you assert yourself, you act forcefully in a way that expresses your confidence: You have to learn to speak up and assert yourself at meetings, or you’ll never get anywhere. assertion
/əˈsɜr·ʃən/ n [C] › Critics say the company forces workers to drive recklessly, an assertion the company denies.