unimpeachable

adjective

un·​im·​peach·​able ˌən-im-ˈpē-chə-bəl How to pronounce unimpeachable (audio)
Synonyms of unimpeachablenext
: not impeachable: such as
a
: reliable beyond a doubt
unimpeachable evidence
an unimpeachable source
b
: not liable to accusation : irreproachable
an unimpeachable reputation
unimpeachably adverb

Examples of unimpeachable in a Sentence

a person of unimpeachable integrity The information is from an unimpeachable source.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Of course, at the heart of it was the man himself, a deeply polarizing music icon whose years-long tirades against everyone from Jewish people to his peers tainted a legacy that once seemed unimpeachable. Steven J. Horowitz, Variety, 2 Apr. 2026 To Kennedy, the enormity of such a scientific and public achievement would provide unimpeachable proof to the world that the American way was superior to life behind the Iron Curtain. Michael Carrafiello, The Conversation, 16 Mar. 2026 MacNeil and Crochet have justifiable faith that regulars like me, lured by their unimpeachable sandwiches and pastas, will look at their constantly changing pastries and feel the exact same way. Chris Morocco, Bon Appetit Magazine, 17 Feb. 2026 That’s an unimpeachable part of his legacy. Alex Zietlow, Charlotte Observer, 17 Feb. 2026 See All Example Sentences for unimpeachable

Word History

First Known Use

1784, in the meaning defined above

Time Traveler
The first known use of unimpeachable was in 1784

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Cite this Entry

“Unimpeachable.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unimpeachable. Accessed 8 Apr. 2026.

Kids Definition

unimpeachable

adjective
un·​im·​peach·​able ˌən-im-ˈpē-chə-bəl How to pronounce unimpeachable (audio)
: not impeachable : not to be doubted or questioned : irreproachable
an unimpeachable reputation
news from an unimpeachable source
unimpeachably adverb

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