undeaf

From un- +‎ deaf.

undeaf (third-person singular simple present undeafs, present participle undeafing, simple past and past participle undeafed)

1. (transitive, nonce word) To free from deafness.
   • 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 II, scene i]:

     My death's sad tale may yet undeaf his ear.

• fundae