undiscover

un- +‎ discover

undiscover (third-person singular simple present undiscovers, present participle undiscovering, simple past and past participle undiscovered)

1. (transitive) To forget or revoke the discovery of (something discovered earlier).
   • 1995, John Dalmas, The Lion of Farside‎:

     It's been happening since man discovered war, and it'll keep on till he undiscovers it, if he ever […]

   • 2013, Rusty Whitener, A Season of Mysteries‎:

     “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...”

   • 2020, Malachy Tallack, The Un-Discovered Islands:

     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.

• undivorces