untold

/ʌnˈtoʊld/
adjective
  1. Too many or too much to be counted or measured; vast or immense.
    • Untold numbers of stars fill the night sky, far beyond what we can see.
    • She has done untold good for the community through her volunteer work.
    • The flood caused untold damage to homes and farms across the region.
  2. Not revealed or expressed; kept secret or not spoken about.
    • He carried untold grief after losing his best friend.
    • The full history of the ancient city remains untold, buried beneath the sand.
    • The old diary contained untold stories of her grandmother's youth.