(n.) Want of loyalty; lack of fidelity; violation of allegiance.

Punic faith apostasy backsliding bad faith barratry betrayal bolt breach of faith breach of promise breach of trust breakaway defection dereliction desertion disaffection faithlessness falseness falsity fickleness going over inconstancy infidelity mala fides perfidiousness perfidy ratting recidivation recidivism recreancy secession treacherousness treason trothlessness turning traitor unfaith unfaithfulness unloyalty unsteadfastness untrueness