while giving directions to your office, you wish to describe a road that many lanes. which one of the following prefies means "many"?

What are your choices?

The prefix that means "many" is "multi-". Therefore, you can describe a road with many lanes using the prefix "multi-". For example, you can say "Take the multi-lane road" or "Turn onto the multi-lane highway." The use of the prefix "multi-" indicates that the road has multiple lanes.