unfaithful
adjective
un·faith·ful
ˌən-ˈfāth-fəl 
: not faithful:
a
: not adhering to vows, allegiance, or duty : disloyal
an unfaithful friend
b
: not faithful to marriage vows
suspected her husband of being unfaithful
c
: inaccurate, untrustworthy
an unfaithful copy of a document
unfaithfulness
noun
Synonyms
Examples of unfaithful in a Sentence
colonists who later proved to be unfaithful to the cause of independence
Recent Examples on the Web
In a separate interview, the former NFL player admits that he’s been unfaithful during his relationship with Brown.
—
Elizabeth Ayoola, Essence, 5 Dec. 2024
News of their breakup came as a shock to most fans, some of whom took to Reddit to share their speculation about the update –– many of whom think Keoghan was unfaithful to the songstress.
—Mark R. Weaver, Newsweek, 4 Dec. 2024
While Anthony, portrayed by Jharrel Jerome, faces his own challenges throughout the film, the matriarch of the movie also raises four children while dealing with an abusive and unfaithful husband, played by Bobby Cannavale.
—Tracy Wright, Fox News, 3 Dec. 2024
The relationship fell apart from there, with Bono growing more temperamental and unfaithful, partially due to an addiction to valium and prescription painkillers.
—David Oliver, USA TODAY, 25 Nov. 2024
See all Example Sentences for unfaithful 
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Elizabeth Ayoola, Essence, 5 Dec. 2024
News of their breakup came as a shock to most fans, some of whom took to Reddit to share their speculation about the update –– many of whom think Keoghan was unfaithful to the songstress.
—Mark R. Weaver, Newsweek, 4 Dec. 2024
While Anthony, portrayed by Jharrel Jerome, faces his own challenges throughout the film, the matriarch of the movie also raises four children while dealing with an abusive and unfaithful husband, played by Bobby Cannavale.
—Tracy Wright, Fox News, 3 Dec. 2024
The relationship fell apart from there, with Bono growing more temperamental and unfaithful, partially due to an addiction to valium and prescription painkillers.
—David Oliver, USA TODAY, 25 Nov. 2024
See all Example Sentences for unfaithful
Dictionary Entries Near unfaithful
Cite this Entry
“Unfaithful.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/unfaithful. Accessed 22 Dec. 2024.
Copy CitationKids Definition
unfaithful
adjective
un·faith·ful
ˌən-ˈfāth-fəl
ˈən-
1
: not observing vows, allegiance, or duty : disloyal
an unfaithful friend
2
: not faithful to marriage vows
3
: inaccurate
an unfaithful translation
unfaithfulness
noun
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