"The league started as a fledgling endeavor and has gone through many trials and tribulations, but it is now firmly entrenched as the #1 sport in North America."
Using context clues, define the following: fledgling, endeavor, entrenched.
Change the informal language in this sentence to formal language. "Defensive touchdowns are among the most exciting plays in football and there is nothing that jacks up a team's collective adrenaline like a monster hit."