The prefix is "ad-" meaning "increase"
The antagonist is the character that somehow obstruct/prevent the main character in achieving his/her goals.
In the story , Tybalt is portrayed as Juliet's cousin who are not agree with Romeo's relationship with Juliet
hope this helps
I love that book. I'm not going to give you a summary but here's what you should include to make it good:
1. Deatailed summary of what it was about
2. Did you like it?
3. what you though of it