Perfidious

Perfidious

Perfidious


per-FID-ee-uhs

Definition

(adjective) Deceitful and untrustworthy; deliberately disloyal.

Example

His perfidious actions during the negotiation shocked even his rivals.

Word Origin

Late Middle English: from Old French perfidieux, from Latin perfidiosus, from perfidia ‘treachery’, based on per- ‘through’ + fides ‘faith’.

Fun Fact

Perfidious isn’t your average insult. It suggests a deep and knowing betrayal, often by someone who pretended to be loyal. Historically, it was used in diplomacy and politics—perfidious Albion was a nickname used by the French to accuse Britain of double-dealing. It shows up in literature, courtroom speeches, and bitter breakups. This isn’t just someone who disappointed you—it’s someone who knew exactly what they were doing.

Previous Words

Sedulous

Today's Word Sedulous SEJ-uh-lus Definition (adjective) Showing dedication and diligence;...

Read More

Licentious

Today's Word Licentious ly-SEN-shus Definition (adjective) Promiscuous and unprincipled in...

Read More

Idolatrous

Today's Word Idolatrous eye-DAH-luh-trus Definition (adjective) Relating to or practicing...

Read More

Reprieve

Today's Word Reprieve rih-PREEV Definition (noun/verb) A temporary delay or...

Read More

Maelstrom

Today's Word Maelstrom MAYL-struhm Definition (noun) A powerful whirlpool; or...

Read More