unkiss

From un- +‎ kiss.

unkiss (third-person singular simple present unkisses, present participle unkissing, simple past and past participle unkissed)

1. (obsolete) To cancel or annul something that was done or sealed with a kiss.
   • 1595 December 9 (first known performance), William Shakespeare, “The Life and Death of King Richard the Second”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act V, (please specify the scene number in lowercase Roman numerals)]:

     Let me unkiss the oath 'twixt thee and me.