Question

prefixes
the prefix \ante\ means \before\.
the guests waited in the antechamber before moving into
the waiting room.
which is most likely the meaning of the underlined
word?
a dungeon
a holding room where people wait before entering the main area
a barn with stables
a tiny bedroom.

Explanation:

The prefix "ante - " means "before". The sentence says guests waited in the antechamber before moving into the waiting room. So, it should be a room where people wait before entering the main area.

Answer:

A holding room where people wait before entering the main area