undiscover

Etymology

un- + discover

verb

1. (transitive) To forget or revoke the discovery of (something discovered earlier).
   It's been happening since man discovered war, and it'll keep on till he undiscovers it, if he ever […] 1995, John Dalmas, The Lion of Farside
   “I want...” I began, “I suppose...I am trying, for lack of a better word, to un-recall these words. To undiscover these things.” “Don't you mean forget?” Throneberry said. I shook my head. “I don't know. Maybe. But forgetting is too weak a word for what I want. I want the words to disappear not just from my mind, but from this...” 2013, Rusty Whitener, A Season of Mysteries
   In fact, as it turned out, Sandy Island had been undiscovered more than once already. Most recently, in the year 2000, a group of amateur radio enthusiasts had noticed its absence while travelling to the Chesterfield Islands, 100km to the west. 2020, Malachy Tallack, The Un-Discovered Islands