unrepeatable

/ˌʌnrɪˈpitəbəl/
adjective
  1. Not able to be done or experienced again; unique.
    • The scientist warned that the experiment's results were unrepeatable due to the rare conditions.
    • The concert was an unrepeatable event because the band broke up the next day.
    • She described her trip to the Arctic as an unrepeatable adventure.
  2. Too offensive or shocking to be said again.
    • He made an unrepeatable joke that offended everyone at the table.
    • Her comment was so rude it was unrepeatable in polite company.
    • The coach shouted something unrepeatable at the referee and got ejected.
Antonyms