un·​fail·​ing | \ ˌən-ˈfā-liŋ How to pronounce unfailing (audio) \

Definition of unfailing

: not failing or liable to fail:
a : constant, unflagging unfailing courtesy
b : everlasting, inexhaustible a subject of unfailing interest
c : infallible, sure an unfailing test

Other Words from unfailing

unfailingly \ ˌən-​ˈfā-​liŋ-​lē How to pronounce unfailing (audio) \ adverb

Synonyms & Antonyms for unfailing



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Examples of unfailing in a Sentence

She is known for her unfailing optimism. an unfailing judge of personal character
Recent Examples on the Web George gives it a good go, though, and Westman brings an unfailing optimism to a put-upon character. Bill Goodykoontz, The Arizona Republic, 12 May 2022 Steve Breyer is a scholar and gentleman, an independent judge and fierce patriot, a man of great wisdom and humor, a collegial consensus-builder and unfailing optimist. Ellen Uchimiya, CBS News, 28 Jan. 2022 Whether by serendipity or study, the act of discovery is an unfailing thrill. Paul Croughton, Robb Report, 12 Dec. 2021 Through thick and thin, faculty have an unfailing allegiance to their students. Kim Cobb, Scientific American, 3 Nov. 2021 What Coward meant by this was the traditions of craftsmanship, professionalism and unfailing attention to audience appeal that are the mainstays of the commercial theater. Washington Post, 30 Oct. 2021 Spies watch, and record, and remember, all with unfailing attention. Jake Bittle, The New Republic, 12 Oct. 2021 The transitions between inner and outer worlds are handled with unfailing deftness. Alex Ross, The New Yorker, 11 Oct. 2021 This challenge comes with profound organizational change management that requires creative and unfailing transformation strategies. Lalit Ahuja, Forbes, 22 Sep. 2021 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'unfailing.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of unfailing

14th century, in the meaning defined above

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The first known use of unfailing was in the 14th century

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Last Updated

14 May 2022

Cite this Entry

“Unfailing.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfailing. Accessed 3 Jul. 2022.

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More Definitions for unfailing


un·​fail·​ing | \ ˌən-ˈfā-liŋ How to pronounce unfailing (audio) \

Kids Definition of unfailing

: not failing or likely to fail : constant unfailing support

Other Words from unfailing

unfailingly adverb He is unfailingly punctual.

More from Merriam-Webster on unfailing

Nglish: Translation of unfailing for Spanish Speakers


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