unfailing
adjective
un·fail·ing
ˌən-ˈfā-liŋ 
: 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
Examples of unfailing in a Sentence
She is known for her unfailing optimism.
an unfailing judge of personal character
Recent Examples on the Web
Yesterday’s pangrams were gainful, unfailing and unflagging.
—
Julia Jacobs, New York Times, 19 May 2025
She’s put off by his sweetness, his refusal to respond to her meanness and his unfailing encouragement, expressing pride in her tiniest recovery wins.
—David Rooney, HollywoodReporter, 3 Sep. 2019
What is most important, always, is an unfailing loyalty to Trump.
—Constance Grady, Vox, 25 Apr. 2025
Not just for the exceptional wines, but for these supremely authentic interactions that are born from an unfailing dedication to the land.
—Nicole Kliest, Vogue, 29 Mar. 2025
See All Example Sentences for unfailing
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Julia Jacobs, New York Times, 19 May 2025
She’s put off by his sweetness, his refusal to respond to her meanness and his unfailing encouragement, expressing pride in her tiniest recovery wins.
—David Rooney, HollywoodReporter, 3 Sep. 2019
What is most important, always, is an unfailing loyalty to Trump.
—Constance Grady, Vox, 25 Apr. 2025
Not just for the exceptional wines, but for these supremely authentic interactions that are born from an unfailing dedication to the land.
—Nicole Kliest, Vogue, 29 Mar. 2025
See All Example Sentences for unfailing
Cite this Entry
“Unfailing.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfailing. Accessed 5 Jun. 2025.
Copy CitationKids Definition
unfailing
adjective
un·fail·ing
ˌən-ˈfā-liŋ
ˈən-
1
: not likely to fail : constant, unflagging
unfailing support
2
: not likely to run out or be used up : everlasting, inexhaustible
an unfailing supply
3
: infallible sense 2
the unfailing mark of an amateur
unfailingly
adverb
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