Perfidious

Adjective

Definition: Betraying trust or confidence; treacherous.

Synonyms: Faithless, Untrustworthy, Deceitful, Disloyal

Antonyms: Faithful, Loyal, Trustworthy

Examples:
  • The perfidious friend shared all the secrets with others.
  • He proved himself to be perfidious by breaking his promises.
Mnemonics:
  • Think of someone who is always plotting and betraying others secretly.

Etymology:

Origin:

Middle English from Latin 'perfidiosus', from 'perfidia' meaning 'faithlessness'

Historical Usage:

The word 'perfidious' has been used in English since the late 15th century to describe someone deceitful or untrustworthy.

Related Idioms:

Idiom:

"Perfidious Albion"

Explanation:

This phrase historically referred to Britain's reputation for breaking agreements or betraying alliances, often in the context of international politics or diplomacy.

Misconceptions:

Misconception:

Confusing the term with "pervidious" or another similar-sounding word.

Explanation:

"Perfidious" specifically implies treachery and betrayal, while similar-sounding words may have different meanings or connotations.

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