Let's say you have a sentence like
The circulatory system plays a dual role of carrying oxygen to the body's tissues and removing carbon dioxide to be expelled from the lungs.
However, what about
The circulatory system plays a _________ role of carrying oxygen to the body's tissues, removing carbon dioxide to be expelled from the lungs, carrying cellular waste products to the liver and kidneys for detoxification, and fighting disease through the production of antibodies.
Best Answer
Triple:
Quadruple:
And quintuple, sextuple, septuple, octuple. One could continue with nonuple but that's getting kind of silly.
(Citations from merriam-webster.com.)