unprecedented
/ənˈpɹɛsɪˌdɛntɪd/
never done or known before
unprecedented in a sentence
“The pandemic caused unprecedented disruption.”
Origin of unprecedented
From un- not + Latin praecedent- going before from prae before + cedere to go
Related Words
unparalleled
having no parallel or equal; exceptional
peerless
unequaled; unrivaled
sporadic
occurring at irregular intervals or only in a few places
intermittent
occurring at irregular intervals; not continuous or steady
ubiquitous
present, appearing, or found everywhere
esoteric
intended for or understood by only a small number