Antonyms of adj undiscovered

2 senses of undiscovered

Sense 1
undiscovered -- (not discovered; "with earth-based telescopes many stars remain undiscovered")

INDIRECT (VIA undetected) -> detected -- (perceived or discerned; "the detected micrometeoritic material")

Sense 2
undiscovered, unexplored -- (not yet discovered; "undiscovered islands")

INDIRECT (VIA unknown) -> known -- (apprehended with certainty; "a known quantity"; "the limits of the known world"; "a musician known throughout the world"; "a known criminal")

Similarity of adj undiscovered

2 senses of undiscovered

Sense 1
undiscovered -- (not discovered; "with earth-based telescopes many stars remain undiscovered")
       => undetected (vs. detected) -- (not perceived or discerned; "they feared some undetected trace of poison"; "she looked around to be sure her faux pas was undetected")

Sense 2
undiscovered, unexplored -- (not yet discovered; "undiscovered islands")
       => unknown (vs. known) -- (not known; "an unknown amount"; "an unknown island"; "an unknown writer"; "an unknown source")