English edit

Etymology edit

un- +‎ precedent +‎ -al

Adjective edit

unprecedental (not comparable)

  1. (obsolete) unprecedented
    • 1881, “The Sugar Bounties Question”, in The Westminster Review, volume 116, page 123:
      The growing of sugar in the West Indies is one of the few industries that has not shown unmistakable signs of “shrinkage” during this late unprecedental continuance of bad times.