undiscovered
adj. B2 Upper Intermediate US //ˌəndɪˈskəvɝd// UK //ʌndɪskˈʌvəd// undis·cov·ered
adj. not found or known about by people yet. You use this to describe things like new places, people, or facts that are still a secret.
adj. not yet found, identified, or known to others. Often used to describe natural resources, species, or historical sites that remain hidden from the public.
The island is still undiscovered by most travelers.
Scientists are searching for undiscovered species in the deep ocean where sunlight never reaches the floor.
The manuscript remained undiscovered for centuries, hidden within the private archives of a monastery until a researcher stumbled upon it during a routine inventory.
From un- + discovered.
From undiscover + -ed.