unexampled
/ˌʌnɛɡˈzɛmpɪd/Definitions
1. adjective
unusual or extraordinary because of its lack of precedent or parallel
“The unexampled bravery of the soldiers in the battle will be remembered forever.”
2. noun
an instance of something that has no precedent or parallel
“The politician’s unexampled rise to power was a remarkable story.”