We can deduce what the word <em>hubris </em>means based on the context clues. If you read the entire sentence, you will see another interesting word - <em>invincible. </em>Invincible means indestructible, invulnerable, someone who cannot be hurt.
So, some race car drivers think it's impossible to hurt them; their <em>overconfidence </em>often causes them to take unnecessary risks. Due to them being overly confident, they often get hurt, contrary to what they initially believed.
