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

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Other Words from unfailing

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

Synonyms & Antonyms for unfailing


infallible, unerring



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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

Given Looney’s unfailing consistency and the team’s varying question marks on their bench, the Warriors want at least one role player with a definitive job description. Mark Medina, The Mercury News, "How will the Warriors handle Durant, Klay and their other free agents?," 27 June 2019 Dante’s legacy is one of boldness, bravery, compassion, and an unfailing commitment to a kinder and more just world for all. Fox News, "Philadelphia's first openly gay deputy sheriff found dead at his desk in apparent suicide," 10 June 2019 Dante's legacy is one of boldness, bravery, compassion, and an unfailing commitment to a kinder and more just world for all. Emanuella Grinberg, CNN, "Philadelphia mourns death of gay deputy and LGBTQ liaison on eve of pride weekend," 9 June 2019 Look no further than Risky Business—and its unfailing popularity as a Halloween costume—for proof of this timeless trick. Vogue, "How to Make a Big Blazer Feel Sexy? Lose the Pants!," 20 Apr. 2019 His unfailing positive attitude was an inspiration to all who knew him. courant.com, "Robert J. Wise," 5 July 2018 Every detail of my stay was organized by Journey Mexico—including all reservations and private VIP tours—with unfailing expertise and graciousness. Mary Kaye Schilling, Town & Country, "How to Plan a Trip to Mexico City," 18 Oct. 2016 His love of life, unfailing generosity, and warm heart will be missed by all who knew him. OrlandoSentinel.com, "Deaths in Central Florida: 5/19," 19 May 2018 Through it all, the two excellent leads meet the challenge with unfailing professionalism and determined smiles. Justin Chang, latimes.com, "Tessa Thompson and Melissa Leo team up in the wan, wobbly dramedy 'Furlough'," 15 Mar. 2018

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.

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First Known Use of unfailing

14th century, in the meaning defined above

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Statistics for unfailing

Last Updated

5 Jul 2019

Look-up Popularity

Time Traveler for unfailing

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

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More Definitions for unfailing



English Language Learners Definition of unfailing

: never changing or becoming weaker even in difficult times
: always providing enough of what is needed


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.

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More from Merriam-Webster on unfailing

Rhyming Dictionary: Words that rhyme with unfailing

Thesaurus: All synonyms and antonyms for unfailing

Spanish Central: Translation of unfailing

Nglish: Translation of unfailing for Spanish Speakers

Comments on unfailing

What made you want to look up unfailing? Please tell us where you read or heard it (including the quote, if possible).


to complain fretfully

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