Define Perfidious

Learn about perfidious behavior and how to recognize deceitful actions in personal and professional relationships.

What does perfidious mean?

Perfidious is an adjective that describes someone who is deceitful, treacherous, or untrustworthy. It is the act of betraying someone’s trust or breaking a promise with malicious intent.

Examples of perfidious behavior

  • A friend who pretends to be loyal but secretly spreads rumors about you.
  • A partner who cheats on you despite promising to be faithful.
  • A business partner who embezzles funds behind your back.

Case studies on perfidious actions

In a study conducted by the University of California, it was found that employees who engage in perfidious behavior cost companies millions of dollars in lost revenue due to their dishonest actions.

Statistics on perfidious behavior

A survey by the National Institute of Ethics found that 30% of employees have witnessed perfidious behavior in the workplace, leading to decreased morale and productivity.


Perfidious behavior can have serious consequences in personal and professional relationships. It is important to be aware of signs of perfidiousness and protect yourself from those who may betray your trust.

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