Synonyms of the word

unexplored

• adj. which has not been explored.

undiscovered

• adj. That has not been discovered; unknown.
• adj. That has not yet been discovered; unexplored.
• v. simple past tense and past participle of undiscover.

unknown

• adj. (sometimes postpositive) Not known; unidentified; not well known.
• n. (algebra) A variable (usually x, y or z) whose value is to be found.
• n. Any fact or place about which nothing is known (as in the phrase "into the unknown").
• n. A person of no identity; a nonentity.