unrepeatable
adjective
un·re·peat·able ˌən-ri-ˈpē-tə-bəl 
: not able to be repeated : not repeatable
an unrepeatable performance
unrepeatably
ˌən-ri-ˈpē-tə-blē
adverb 
Example Sentences
Recent Examples on the Web Much of modern art was an attempt to escape this truism — to make pictures that don’t depict anything and are therefore singular, unrepeatable. 
Sebastian Smee, Washington Post, 28 July 2022 One unrepeatable Ferrari made for long-distance competition will be offered at the RM Sotheby’s sale, running from August 18 through 20, during Northern California’s famed Monterey Car Week. Robert Ross, Robb Report, 11 July 2022 The example offered by RM Sotheby’s during its annual sale in Monterey, Calif., from August 18 through 20, is justly famous, not just for its exquisite and unrepeatable body but because of its provenance and competition history. Robert Ross, Robb Report, 27 June 2022 Even without such rarified and unrepeatable provenance, this 300 SL would be a highly desirable car. Robert Ross, Robb Report, 21 Feb. 2022 Revising American cultural history this way erases West Side Story’s original, unrepeatable, indisputable impact. Armond White, National Review, 10 Dec. 2021 Powered by climate data, each showing is unrepeatable and speculative, a meditation on time, change and loss in an irreplaceable landscape. Brent Lang, Variety, 9 Dec. 2021 Powered by climate data, each showing is unrepeatable and speculative, a meditation on time, change and loss in an irreplaceable landscape. Natalie Lin, Vulture, 9 Dec. 2021 If the ex-Fangio Gordini offers insufficient temptation to peruse this sale, the Bandini Collection that will also be available presents an unrepeatable opportunity to acquire nine other rare competition vehicles bearing the name Gordini. Robert Ross, Robb Report, 15 Nov. 2021 See More
Sebastian Smee, Washington Post, 28 July 2022 One unrepeatable Ferrari made for long-distance competition will be offered at the RM Sotheby’s sale, running from August 18 through 20, during Northern California’s famed Monterey Car Week. Robert Ross, Robb Report, 11 July 2022 The example offered by RM Sotheby’s during its annual sale in Monterey, Calif., from August 18 through 20, is justly famous, not just for its exquisite and unrepeatable body but because of its provenance and competition history. Robert Ross, Robb Report, 27 June 2022 Even without such rarified and unrepeatable provenance, this 300 SL would be a highly desirable car. Robert Ross, Robb Report, 21 Feb. 2022 Revising American cultural history this way erases West Side Story’s original, unrepeatable, indisputable impact. Armond White, National Review, 10 Dec. 2021 Powered by climate data, each showing is unrepeatable and speculative, a meditation on time, change and loss in an irreplaceable landscape. Brent Lang, Variety, 9 Dec. 2021 Powered by climate data, each showing is unrepeatable and speculative, a meditation on time, change and loss in an irreplaceable landscape. Natalie Lin, Vulture, 9 Dec. 2021 If the ex-Fangio Gordini offers insufficient temptation to peruse this sale, the Bandini Collection that will also be available presents an unrepeatable opportunity to acquire nine other rare competition vehicles bearing the name Gordini. Robert Ross, Robb Report, 15 Nov. 2021 See More Word History
First Known Use
1831, in the meaning defined above