unmatched

verb
  1. 1

    To separate a matching pair.

adjective
  1. 1

    (of a pair of things) not matched; odd

  2. 2

    (of a single thing) not matched with anything else

  3. 3

    Peerless; unrivalled; beyond comparison

Source: https://en.wiktionary.org/wiki/unmatch, https://en.wiktionary.org/wiki/unmatched