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Trust is one of the foundations of human relationships, whether in personal life, politics or business. When that trust is deliberately broken, the consequences often extend far beyond the immediate act itself. The word perfidious is used to describe such behaviour. It refers to someone who betrays confidence, breaks faith or acts with calculated disloyalty . The term is stronger than simply calling a person dishonest. It suggests a breach of trust that involves deception, treachery or a willingness to abandon commitments when it proves convenient. As a result, perfidious frequently appears in historical writing, literature and political commentary where questions of loyalty and betrayal are central.


What does the word Perfidious mean

Perfidious describes a person, action or behaviour marked by betrayal, deceit or deliberate unfaithfulness. The word is used when someone proves untrustworthy by breaking promises, violating loyalties or acting treacherously.


Pronunciation of the word Perfidious

• Phonetic pronunciation: /pəˈfɪdiəs/
• Simple pronunciation: per-FID-ee-uhs
• The stress falls on the syllable: FID.

Origin of the word Perfidious

The term traces its roots to the Latin perfidia, meaning “faithlessness” or “treachery”. It entered English through French and retained its association with broken trust, betrayal and the abandonment of obligations or loyalties.

How to use the word Perfidious in sentences

• The novel's central conflict begins with a perfidious act of betrayal.
• Many regarded the commander as perfidious after he abandoned his allies.
• The agreement collapsed following what officials described as perfidious behaviour.
• His perfidious conduct damaged relationships that had taken years to build.

Synonyms of Perfidious

• Treacherous
• Faithless
• Deceitful
• Disloyal

Antonyms of Perfidious

• Loyal
• Faithful
• Trustworthy
• Dependable