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

If that’s what Chris thought, imagine how Hannah felt underneath her Miss Alabama smile and unfailing Southern hospitality. Ariana Romero, refinery29.com, "Hannah Finally Gave A Full Explanation For The Luke P. Fiasco On Bachelorette “Men Tell All”," 25 July 2019 His unfailing energy, optimism for our city and enthusiasm for all aspects of policing will be missed. Evan Sernoffsky, SFChronicle.com, "The Scanner: San Mateo’s first female police chief to retire; Palo Alto police rough up gay man," 29 July 2019 During the day, El-Samad would bury herself in the textbooks her mother, a math teacher, brought home—the unfailing law and order of numbers and equations her cloak against the uncertainty outside. Megan Molteni, WIRED, "Scientists Can Finally Build Feedback Circuits in Cells," 26 July 2019 One of the of the organization’s blind spots is unfailing loyalty. Mark Kiszla, The Denver Post, "Kickin’ It with Kiz: So what’s reasonable definition of success for Joe Flacco in his first year as Broncos quarterback?," 20 July 2019 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

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

16 Aug 2019

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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

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marked by turns or indirection

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