disloyalty
/dɪsˈlɔɪ(ə)lti
/noun [mass noun]
The quality of not being loyal to a person, country, or organization; unfaithfulness: an accusation of disloyalty and betrayal...
- By your historically unprecedented disloyalty, you have betrayed our trust.
- As a father himself he finds such disloyalty and betrayal completely unacceptable.
- The cocaine trade being so lucrative, it encouraged disloyalty and betrayal.
Synonyms
unfaithfulness, infidelity, inconstancy, faithlessness, fickleness, unreliability, untrustworthiness, breach of trust, breach of faith, betrayal, falseness, false-heartedness, falsity;
duplicity, double-dealing, treachery, perfidy, perfidiousness, treason, subversion, sedition, dissidence;
adultery
informal back-stabbing, two-timing
rare hollow-heartedness, Punic faith, recreancy