unrepeated

English

Etymology

un- +‎ repeated

Adjective

unrepeated (not comparable)

1. Not having been repeated

   This accomplishment had been unrepeated, until now.

   • 2009 January 12, Steve Smith, “Worlds Apart: Harmonies Earthbound and Lunar”, in New York Times‎^[1]:

     Sentimentality is the last thing that comes to mind in Schoenberg's "Pierrot Lunaire," a 1912 piece seemingly without precedent, and an unrepeated stylistic cul de sac.