What meaning does the suffix at end of auditorium convey?

The suffix "-ium" at the end of "auditorium" comes from the Latin word "-ium", which means "place" or "room".

Therefore, the suffix "-ium" in "auditorium" indicates that it is a place or room for hearing.

This makes sense considering that "auditorium" is a large room designed for audiences to hear and watch performances, lectures, or other events.