The word "untold" means that something is not counted or measured, or it can imply that something has not been expressed or told before. Full definition
The long awaited fifth installment of the Metal Gear Solid series has finally arrived, and Kojima has promised to reveal the last chunk of untold story of the Metal Gear saga. (playstationing.com)
Jen's advocacy has helped to improve the lives of untold numbers of children in our state. (necharters.org)
Back in November 2013, we visited the set of Dracula Untold in Belfast, Ireland to find out what Universal Pictures and director Gary Shore have planned for Dracula's origin story. (screenrant.com)