Definition

A deliberate act of betrayal or treachery, often involving a breach of trust.

Example

His perfidy shocked everyone who thought he was a loyal friend.

Conversation

Did you hear about what happened with Tom and Jerry?

Yeah, I heard there was some serious perfidy involved.

It's so surprising; I never thought Tom would betray Jerry like that.

I know, right? It really changes how I see their friendship.

Synonyms & Antonyms

Root Explanation

Perfidy → It is formed from "per-" (meaning through) and "fides" (meaning faith or trust). The word describes the act of betraying trust or faith, hence signifying treachery.

Memory Tip

Think of 'faith' ('fides') being broken 'through' ('per-') — that's why perfidy means betrayal of trust.

Visually Confused Words