When someone overasserts, they state something too strongly or confidently.
Overasserting can make people feel uncomfortable or annoyed if they don't agree with what is being said.
Examples:
She overasserts her knowledge about dinosaurs.
He always overasserts his opinions in class.
The salesman overasserts the benefits of the product.
He overasserts his ability to fly.
She overasserts her authority as a boss.
The child overasserts that he is a superhero.