I was just wondering if there a single English word or term that means "trust breaker" (that is, a person who breaks a trust).

  • Seems a "trust breaker" or "deal breaker" is a term for something someone does that changes the relationship. Hence the single word for such a concept would depend on the relationship. Infidelity could be a trust breaker in a personal relationship, but the overall term would still be trust breaker
    – mplungjan
    Commented Aug 12, 2013 at 12:38
  • But "trust breaker" could also be someone who breaks a trust. The question is ambiguous.
    – Andrew Leach
    Commented Aug 12, 2013 at 13:19
  • @AndrewLeach what I meant was, as you mentioned, someone who breaks trust in personal relationships.
    – Aram
    Commented Aug 12, 2013 at 13:30
  • @user49582 Fixed that for you.
    – Andrew Leach
    Commented Aug 12, 2013 at 13:32
  • 1
    Yes, but infidelity is a form of trust breaking. Not a word for trust breaking in general
    – mplungjan
    Commented Aug 12, 2013 at 13:36

3 Answers 3


The words "turncoat" and "deceiver" can be used to mean "trust breaker," but both have a connotation of betrayal.


Traitor and Betrayer are the two words I can think of other than the ones mentioned in the above answer.


The strongest single term I can think of is "perfidious", relating of or to "perfidy" - the deliberate breach of trust, or betrayal.

Other words would include "oathbreaker" (arguably a compound word, "oath-breaker"), or traitor.

  • Welcome to ELU. Your answer would benefit from citing a source and perhaps an example sentence.
    – livresque
    Commented Sep 3, 2020 at 2:03

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.