1
as in informer
a person who provides information about another's wrongdoing
the arrested drug dealer vowed that he would get his revenge on his betrayer
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2
as in traitor
one who betrays a trust or an allegiance
the betrayer of Anne Frank's family in Amsterdam has never been identified for certain
Synonyms & Similar Words
Example Sentences
Recent Examples of Synonyms for betrayer
Noun
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The court can instruct the jury to view with caution the testimony of, say, an informer or a drug addict.—
Daniel Arkin,
NBC news,
10 June 2025 -
Singh says that the Kashmir policy of India's Hindu nationalist government has alienated residents of Kashmir, and cost the Indian army its vital network of local informers.—
Omkar Khandekar,
NPR,
23 Apr. 2025
Noun
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Young-il’s brother is still searching for the island — but a traitor on the boat is preventing the detective from reaching the game site.—
Monica Mercuri,
Forbes.com,
28 June 2025
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Meanwhile, Jun-ho continues his search for the island on which the Squid Games are taking place - but there's a traitor amongst his team.—
Griff Griffin,
MSNBC Newsweek,
24 June 2025
Noun
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The defendants suggested one of the informants is either someone in current House Speaker Cameron Sexton's office – or is the speaker himself.—
Rosalind Bowling,
The Tennessean,
2 July 2025
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Encouragingly, this discernment may translate to digital informants like computers too.—
Evan Orticio,
Scientific American,
2 June 2025
Noun
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Talent opting out of top jobs is a canary in the coal mine.—
Solange Charas,
Forbes.com,
27 May 2025
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Valor Christian’s former head football coach is the canary in the coal mine for Colorado high school sports.—
The Denver Post Editorial Board,
Denver Post,
15 May 2025
Noun
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Humans hate navigating a rat maze and having robots talk at them.—
Expert Panel®,
Forbes.com,
30 June 2025
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Also known as the Andalusian terrier, these dogs were bred to help protect vineyard wine cellars from potential rat infestations.—
Liz O'Connell,
MSNBC Newsweek,
28 June 2025
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Cite this Entry
“Betrayer.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/betrayer. Accessed 13 Jul. 2025.
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