a-re-na (uh RE nuh) n1.a central area used for sports or other forms of entertainment and surrounded by seats for spectators 2. a field of competition or activity adj. taking place in an arena, as in arena football [From the Latin herena or "sand"; in ancient times, sand was spread on the grounds where competitions of combat were held]

According to word history, what is the origin of the word arena?
It comes from a form of in ancient Rome
It comes from the name of a famous gladiator
It comes from a Latin word meaning "Sand"****
It was originally a cheer used by spectators at ancient games

Right.

http://www.etymonline.com/index.php?allowed_in_frame=0&search=arena

The origin of the word "arena" comes from a Latin word meaning "sand." In ancient times, sand was spread on the grounds where competitions of combat were held. So, the correct answer is: It comes from a Latin word meaning "sand."