unprecedented
un-PRES-i-den-tid/ʌnˈpɹɛsɪdɛntɪd/AUSun-PREE-suh-den-tuhd/ʌnˈpɹiːsədɛntəd/
- 1Never before seen, done, or experienced; having no earlier example to compare against.
The outbreak forced governments to take unprecedented measures across the region.
The team finished the year with an unprecedented run of thirty straight wins.
Similarunparalleled, unheard-of, unmatched, extraordinary, unequaled
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Origin
Formed from the prefix "un-" combined with "precedent" and the suffix "-ed".