What does betrayal mean?
Betrayal is a noun denoting the act of being disloyal or unfaithful to someone who has placed their trust in you — whether a friend, a spouse, a colleague, or one's own principles — as well as, less commonly, the unintended revelation of a secret or a hidden feeling. It is among the most emotionally charged words in English, evoking broken promises, wounded relationships, and violated loyalties, and it appears constantly in literature, politics, and personal narrative. Speakers use it in fixed phrases such as 'an act of betrayal', 'a betrayal of trust', and 'the ultimate betrayal', and it often follows verbs like 'feel' or 'forgive': 'she could not forgive his betrayal'. The word derives from the verb 'betray', tracing back through Old French to the Latin 'tradere', 'to hand over', making it a relative of 'traitor', 'treason', and even 'tradition'. Because trust underpins so much of human life, 'betrayal' remains an indispensable term for describing its rupture.
nounThe act of betraying someone or something; an instance of being disloyal or unfaithful to a person, trust, or cause. It can also denote the unintentional revealing or disclosure of information or feelings.
- The act or an instance of betraying a person, trust, country, or cause; treacherous disloyalty.
- The unintentional revealing or disclosure of something meant to be hidden, such as information or one's true feelings.
"She never fully recovered from the betrayal of her closest friend."
"His betrayal by his business partner left him wary of ever trusting again."
"A slight tremor in her voice was a betrayal of the confidence she was trying to project."
The plural is standard for referring to multiple distinct instances of betrayal; the singular uncountable form is preferred when discussing betrayal as a general concept.
"History remembers the dictator for his many betrayals of former allies."
The word 'betrayal' shares its deepest root with 'tradition' — both come from the Latin 'tradere', 'to hand over'; one hands down what we cherish, the other hands over what we trusted.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of betrayal
Betrayal comes from the verb 'betray', formed in Middle English from the prefix 'be-' plus 'tray', borrowed from Old French 'trair' ('to betray'), which derives from the Latin 'tradere' meaning 'to hand over' or 'deliver up'. The same Latin root produced 'traitor', 'treason', 'trait', and, through a different semantic path, 'tradition' and 'trade'. The noun 'betrayal' arose in English later than the verb, following the common pattern of forming nouns of action with the '-al' suffix, and has been in continuous use since at least the early modern period.
Related word forms
How betrayal is actually used
'Betrayal' carries strong negative emotional connotations and is common in both everyday and literary registers. It frequently appears with possessives and prepositions such as 'a betrayal of trust' or 'feelings of betrayal'. The second sense — an involuntary disclosure, as in 'the betrayal of emotion on his face' — is more neutral and often used in descriptive writing.
Easily confused with betrayal
'Betray' is the verb meaning to commit the act, while 'betrayal' is the noun naming the act itself.
A 'traitor' is the person who commits a betrayal, whereas 'betrayal' is the act or instance of disloyalty.