Definition
  1. deceitful and untrustworthy

    synonyms:treacherousdisloyal
Origin & Use

The word 'perfidious' comes from the Latin 'perfidiosus', which is derived from 'perfidus', meaning 'treacherous' or 'faithless'. The prefix 'per-' suggests 'through' or 'completely', while 'fidus' relates to faith, highlighting a complete betrayal of trust.


This word is often used in literature, legal contexts, and discussions about trust and betrayal, making it less common in everyday conversation.


3/10

While 'perfidious' accurately describes betrayal and deceit, it is more likely to appear in formal, literary, or dramatic contexts rather than in casual conversation.

Examples

The perfidious actions of the spy shocked everyone in the intelligence community.

In the novel, the perfidious friend betrays the protagonist at the most critical moment.

Her perfidious behavior led to a complete breakdown of trust within the team.

More Info

The term 'perfidious' paints a vivid picture of betrayal and deceit, often used to describe someone who is treacherous in their actions. With roots tracing back to Latin, this word carries a weight of history and gravity, making it a favorite among writers and speakers who wish to articulate feelings of mistrust. Although it may not roll off the tongue in everyday chats, 'perfidious' finds its home in dramatic tales and cautionary tales alike. So, the next time you encounter a double-crosser, you might just call them perfidious!

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