unwish

From un- +‎ wish.

unwish (third-person singular simple present unwishes, present participle unwishing, simple past and past participle unwished)

1. (transitive, obsolete) To wish not to be; to destroy by wishing.
   • 1599 (date written), William Shakespeare, “The Life of Henry the Fift”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene iii]:

     Now thou hast unwished five thousand men.

2. (transitive) To undo a wish