The definition of betrayal is the breaking of an agreement or doing something to hurt a relationship.
The definition of a perfidy is a deliberate betrayal.
Treason is the act of betraying your country or a betrayal of trust.
The state or quality of being loyal.
Something false; esp., a lie
(Genetics) A cross in which each parent is the product of a single cross. It can be represented as AB x CD, where A, B, C, and D are inbred lines.
The act of selling out.
Lack of honesty or integrity; improbity.
(Law) Convicted of a crime, such as treason or felony, that carries a severe punishment. No longer in technical use.
That is plainly such; out-and-out; notorious
Given to or marked by deliberate deceptiveness in behavior or speech.
The definition of perfidious is someone or something that cannot be trusted or that is dishonest.
Having the character of a traitor; disloyal
The definition of treacherous is someone who is guilty of dishonesty or betrayal, or something that is dangerous or hazardous.
The act of representing as true what is known to be false; a deceiving or lying
Duplicity is defined as deception or a lie.
An act of sexual unfaithfulness.
Fidelity is defined as being loyal or faithful, or an accurate copy.
(Countable) An unchanging quality or characteristic of a person or thing.
A feeling of devotion or adoration toward God or a god.
Reliance on something in the future; hope:
Find another word for treachery. In this page you can discover 55 synonyms, antonyms, idiomatic expressions, and related words for treachery, like: betrayal, perfidy, treason, faithlessness, disloyalty, viperish, triplicity, malignant, loyalty, treacherousness and false-heartedness.