Definition

The act of betraying someone or something, especially by breaking trust or loyalty.

Example

His treachery was revealed when he shared secrets with the enemy.

Conversation

Did you hear about the treachery in that new movie?

Yeah, it was shocking how the main character betrayed their friend.

I know, right? It really made me think about trust in friendships.

Exactly! I hate when treachery messes up good relationships.

Synonyms & Antonyms

Root Explanation

Treachery → It originates from Old French *trecherie*, which comes from *trecher* (meaning to deceive or trick). The word refers to the act of betraying trust or being deceitful.

Memory Tip

Think of the Old French word for deception, 'trecher', to remember that treachery means betrayal or deceit.

Visually Confused Words