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Synonyms

unfailing

American  
[uhn-fey-ling] / ʌnˈfeɪ lɪŋ /

adjective

  1. not failing; not giving way; not falling short of expectation; completely dependable.

    an unfailing friend.

  2. inexhaustible; endless.

    unfailing resources; unfailing good humor.


unfailing British  
/ ʌnˈfeɪlɪŋ /

adjective

  1. not failing; unflagging

  2. continuous or unceasing

  3. sure; certain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

Etymology

Origin of unfailing

Middle English word dating back to 1350–1400; see origin at un- 1, failing

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

“The Ten Year Affair” handles these twists with unfailing intelligence, capturing the sincere but confusingly improvised mores of marriage today.

From The Wall Street Journal Oct. 31, 2025

A major contributor to the 7M cult’s perceived creepiness is the dancers' unfailing polish and flat if gleaming expressiveness.

From Salon Jun. 6, 2024

Though Green’s love for the game is unfailing, it’s not uncritical.

From Los Angeles Times Dec. 16, 2022

“What stands out most for me is her unfailing support of the marginalized, her extreme selflessness, her dogged belief that everyone can win,” said Orji, who starred on “Insecure.”

From Seattle Times Dec. 8, 2022

Refuge unfailing in which conflict tempered silenced reconciled.

From "The Sound and the Fury" by William Faulkner

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