unrepeatable
Cannot occur again
Unrepeatable describes something that cannot or should not be repeated.
An unrepeatable experience is unique—a once-in-a-lifetime event that circumstances won't allow again.
Unrepeatable words are too offensive or vulgar to say aloud in polite company: His comments were unrepeatable in front of the children.
Passing very quickly
- transientTemporary, soon departing
- evanescentTending to vanish quickly
- momentaryLasting very briefly
- passingMoving by or temporary
impermanent · short-lived · transitory · fugitive · fugacious · vanishing · temporary · brief
Only one exists
- one-of-a-kindHaving no equivalent
- irreplaceableHaving no adequate substitute
- inimitableImpossible to imitate
- nonpareilUnrivaled, beyond compare
unparalleled · matchless · peerless · unmatched · incomparable · distinctive · original · novel
Of lasting significance
- epochalMarking a historic division
- landmarkNotable point of reference
- pivotalVitally important, deciding
- seminalFoundational and influential
monumental · transformative · groundbreaking · revolutionary · consequential · memorable · unforgettable · once-in-a-lifetime
Restricted from disclosure
- restrictedLimited in scope
- off-the-recordNot for attribution
- privateRestricted to certain parties
- secretConcealed information
privileged · sensitive · embargoed · unquotable · unprintable
fleeting
Passing very quickly
- transientTemporary, soon departing
- evanescentTending to vanish quickly
- momentaryLasting very briefly
passing · impermanent · short-lived · transitory · fugitive · fugacious · vanishing · temporary · brief · elusive
unique
Only one exists
- one-of-a-kindHaving no equivalent
- irreplaceableHaving no adequate substitute
- inimitableImpossible to imitate
nonpareil · unparalleled · matchless · peerless · unmatched · incomparable · distinctive · original · novel · unprecedented
historic
Of lasting significance
- epochalMarking a historic division
- landmarkNotable point of reference
- pivotalVitally important, deciding
seminal · monumental · transformative · groundbreaking · revolutionary · consequential · memorable · unforgettable · once-in-a-lifetime · watershed
classified
Restricted from disclosure
- restrictedLimited in scope
- off-the-recordNot for attribution
- privateRestricted to certain parties
secret · privileged · sensitive · embargoed · unquotable · unprintable
- one-time thingsonce, single-use, one-off, disposable, nonrecurring
unrepeatablerepeatable
Can be duplicated
reproducible · replicable · consistent · duplicable · reliable
unrepeatableprintable
Able to be printed
quotable · repeatable · decent · family-friendly · clean
repeat, repeated, repeating, repetition, repetitive, repeatedly, repeaters, repeatable, repeater