Synonyms of 'betray'
1 be disloyal to
He might be seen as having betrayed his mother.
be disloyal to
grass on (British , slang)
dob in (Australian , slang)
They were frightened of being double-crossed.
stab in the back
be unfaithful to
sell down the river (informal)
grass up (slang)
shop (slang , mainly British)
Fraudsters are often shopped by honest friends and neighbours.
put the finger on (informal)
inform on or against
sell out (informal)
be treacherous to
2 give away
She studied his face, but it betrayed nothing.
The facts tell a very different story.
She had enough time to show her gratitude.
She has refused to reveal her daughter's whereabouts.
After the scandal was exposed, he committed suicide.
clapboard façades that revolve to disclose snug interiors
Auditors said they had uncovered evidence of fraud.
He's only convincing when that inner fury manifests itself.
He was charged with divulging state secrets.
Elliott unmasked the master spy and traitor.
He had never, hitherto, evinced any particular interest in economic matters.
To betray, you must first belong
Copyright © 2016 by HarperCollins Publishers. All rights reserved.
If you abandon a place, thing, or person, you leave the place, thing, or person permanently or for a long time, especially when you should not do so.
He claimed that his parents had abandoned him.
If someone deserts you, they go away and leave you, and no longer help or support you.
Her husband deserted her years ago.
Thesaurus for betray from the Collins English Thesaurus
If you betray someone who loves or trusts you, your actions hurt and disappoint them.