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unprecedented

adjective

Simple meaning

Never known, experienced, or done before.

Pronunciation

Say it like this:

uhnprehsihdentid

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US device voice
IPA pronunciation (US)

ənpˈɹɛsɪdɛntɪd

This word is pronounced essentially the same in American and British English, so one transcription covers both.

IPA (International Phonetic Alphabet) is a standard way of writing speech sounds.

Word Review

Definition

Everyday modern meanings first, grouped by part of speech.

adjective

  1. Never before seen, done, or experienced; without precedent.

Understand the Word

How this word is built, and what each part adds.

un- + precedentunprecedented

The base word precedent means an earlier example, so unprecedented means there is no earlier example of it.

un-
not, or without
precedent
an earlier event used as an example

Prefix function , Not — expresses absence of the quality

Word at a Glance

Difficulty
B2 · Upper Intermediate
Frequency
Moderately Common
Typical Use
Neutral / general English

Word Aura™

How this word commonly comes across.

Aura for this meaning

This meaning: Never before seen, done, or experienced; without precedent.

Used this way, unprecedented is a reasonably familiar word that usually carries little praise or criticism of its own. It usually sounds natural in a wide range of settings.

Emotional tone
Neutral
Formality
Neutral
Intensity
Not strongly marked
How common
Moderately common
Connotation
No strong connotation
Usage feel
Neutral and straightforward

Word Aura describes common impressions, not a measurement. Tone changes with sentence, speaker, relationship and situation.

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Common Patterns and Combinations

How this word naturally appears with others.

unprecedented scaleunprecedented degreeunprecedented growthunprecedented rateunprecedented numberunprecedented stepunprecedented levelunprecedented opportunity

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Dictionary data from Wiktionary via the Free Dictionary API. Simple meanings, combinations and word intelligence are built from verified reference data, no AI is used to load this page.