• Why "Undiscovered" is the correct synonym:
Breaking down the word: The word uncharted comes from "chart." A chart is a map used by sailors or explorers.
Prefix "un-": Means "not."
Root "chart": Means "mapped" or "recorded."
Suffix "-ed": Indicates a state or condition.
Therefore, uncharted literally means "not recorded on a map."
Contextual Clues: The sentence mentions an "explorer" and the act of "searching for adventure." Explorers typically go to places that are undiscovered or unknown to their civilization.
Meaning: If a territory is uncharted, it means no one has documented it or explored it thoroughly yet.