Skip to main content

perfidiousdeliberately faithless; treacherous; deceitful

Part of speech: ADJECTIVE

Definition: deliberately faithless; treacherous; deceitful

Pronunciation (IPA): /pərˈfɪdiəs/

Example Sentences

  • The perfidious friend sold my secret recipe to my rival restaurant for money.
  • His perfidious nature was revealed when he leaked confidential information to competitors.
  • The perfidious cat pretended to be asleep while secretly plotting to steal my sandwich.

perfidious

ADJECTIVE

[/pərˈfɪdiəs/]

deliberately faithless; treacherous; deceitful

The perfidious advisor smiles at the king while secretly passing battle plans to the enemy.
💡 Concept

The perfidious advisor smiles at the king while secretly passing battle plans to the enemy.

Fastidious facade hides perfidious and insidious betrayal
🎵 Rhyme

Fastidious facade hides perfidious and insidious betrayal

Got the picture? Now let's practice.

🎤Pronunciation

🇺🇸 US/pərˈfɪdiəs/
🇬🇧 UK/pəˈfɪdiəs/

🌳Etymology

Prefixper--
Rootfid
Suffix--ious

Origin

From Latin 'perfidiosus', derived from 'perfidus' meaning 'faithless' or 'treacherous', which combines 'per-' (through/thoroughly) with 'fidus' (faithful, from 'fides' meaning faith or trust).

Breakdown

per- (through/thoroughly) + fid (faith, trust) + -ious (adjective suffix) = perfidious (deliberately faithless or treacherous)

🎵Rhyme

insidiousfastidiousinvidious
insidious
fastidious
invidious

🔗Collocations

perfidious betrayal
perfidious ally
perfidious conduct
perfidious scheme
act perfidiously

📝Examples

😄 Fun example

The perfidious friend sold my secret recipe to my rival restaurant for money.

His perfidious nature was revealed when he leaked confidential information to competitors.

😄 Fun example

The perfidious cat pretended to be asleep while secretly plotting to steal my sandwich.

Shakespeare often portrayed perfidious characters who appeared loyal but harbored evil intentions.

📚Related Words

Synonyms

treacherousdisloyalfaithlessdeceitfultraitorous

Antonyms

loyalfaithfultrustworthy

Related

perfidybetrayaltreacheryinfidelityduplicity

Want to master 19,000+ words?

Sign up free for flashcards & quizzes.