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unheard-of

unheard-of

57 6.7
Very unusual because it has never happened before
  • adjective
  • /ʌnˈhɜrd ʌv/
translation icon : insólito
  • In fact, the judge has already agreed to reopen the investigation, which is almost unheard of.
  • almost unheard-of
  • practically unheard-of
  • unheard-of at the time

I got a standing ovation, which was unheard of for this work.

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Examples

  • He made it his first priority to ensure his own men were properly paid and fed, something almost unheard of for French troops in Spain.

  • We waited over an hour for clearance, which was unheard of in most systems but fairly common here.

    Fiction book (1991)
  • No, that would be unheard of in the Roman world.

  • So I found a Chinese source that had unheard of low prices.

  • But back then, it was unheard of.

  • Previously unheard of sounds were coming out of his instrument.

  • Our schools are doing things today unheard of in past generations.

    Academic text (2015)
  • When I first started coaching, a day off for my players was unheard of.

    Academic text (2009)
  • "Receiving the kind of money we did is almost unheard of in the world of marine archaeology."

    Academic text (2006)
  • Heart, liver, and lung transplants, almost unheard-of in the early 1970s, are common today.

Synonyms

new
vsunheard-of
1.0

Recently made or found and not seen before

refers to not having existed or happened before, not just recent
unusual
vsunheard-of
2.2

Not common and different from what people expect

denotes absolute prior absence rather than mere rarity or oddness
unprecedented
vsunheard-of
235 6.3

Has never happened before

is the more informal everyday way to express lack of precedent
strange
vsunheard-of
207 2.3

Not known or familiar to you

means it did not happen before generally, not only odd to someone
uncommon
vsunheard-of
122 4.6

Not often found or seen and so rare

indicates never having occurred before rather than simply being rare
unfamiliar
vsunheard-of
104 4.4

Not known or seen before

applies to general historical absence rather than only personal lack of knowledge
newfound
vsunheard-of
80 3.9

Recently found or felt for the first time

means unknown historically rather than simply recently found
novel
vsunheard-of
72 5.1

New and different, not seen or done before

focuses on prior absence rather than creative originality
out of the ordinary
vsunheard-of
48 4.1

Not usual and different from what people expect

stresses having never happened before rather than just being unusual
undiscovered
vsunheard-of
23 4.0

Not yet found or known by people

focuses on not having been known before, not just unfound objects
unexplored
vsunheard-of
21 4.9

Not yet found or studied

is about absence of prior occurrence, not only lack of investigation
unimagined
vsunheard-of
2 7.0

Not thought of before or expected

focuses on factual absence rather than only lacking in people's imagination
undreamed of
vsunheard-of
1 7.5

Far greater or more surprising than people ever imagined

refers to prior absence, not only extreme wonder or imagination
unwonted
vsunheard-of
  • Literature
1 9.9

Not usual or expected in a situation

is about lack of prior occurrence rather than mere uncommonness
unexampled
vsunheard-of
9.6

Not seen or done before

is the everyday less formal way to say the same idea
8.5

A unique thing or event that will never happen again

emphasizes not having happened before rather than unrepeatability
unthought-of
vsunheard-of
7.9

No one expects it before it happens

means not known to have happened rather than merely unexpected
uninvented
vsunheard-of
8.4

Not yet created or imagined

means never having happened before rather than only not being created

How Common

common
797 1.0
uncommon
122 4.6
rare
582 4.1
unheard-of
57 6.7

Surface Forms

unheard-of positive

Morphology

unheard-of = hear (transparent) = un + heard

The adjective is formed by negating 'heard' (via un-) in the fixed phrase 'unheard of', so learners who know 'hear/heard' and the prefix 'un-' can readily infer 'not known; unprecedented'.

Etymology

Unheard-of comes from the simple parts un- 'not' and heard 'heard', so it literally means 'not heard' or 'unknown'. So, if something is unheard-of, nobody has heard of it before and it feels new or surprising.