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Showing results for unfaithful. Search instead for unfaithfuln.
Definitions

unfaithful

[uhn-feyth-fuhl] / ʌnˈfeɪθ fəl /
ADJECTIVE
disloyal, adulterous
Synonyms
STRONGEST
cheating untrue
WEAK
adulterine deceitful double-crossing faithless false false-hearted fickle foresworn inconstant incontinent moonlighting not true to of bad faith perfidious philandering recreant shifty snaky sneaking traitorous treacherous treasonable two-faced two-timing unchaste unreliable untrustworthy wicked
Antonyms
WEAK
faithful loyal trustworthy

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.

Once the Games began, they were humiliated again by another kind of cheating scandal involving an unfaithful biathlete.

From The Wall Street Journal • Feb. 17, 2026

"And three months ago, I made the biggest mistake of my life and I was unfaithful," he continued.

From Barron's • Feb. 11, 2026

According to Pratt, MTV was not satisfied with him merely portraying an unfaithful boyfriend.

From Los Angeles Times • Jan. 27, 2026

The construction worker was filmed tearfully pleading: "I swear to God, I am being so straight... I have not been unfaithful to her."

From BBC • Sep. 10, 2024

“Is... that why you’re angry with her? Because she was unfaithful to him?”

From "Insurgent" by Veronica Roth