What context can I use each word in?
Learn when and how to use these words with these examples!
perfidious
Example
He was known for his perfidious behavior, always lying and cheating to get ahead. [perfidious: adjective]
Example
Her perfidious actions led to the downfall of the company. [perfidious: noun]
treacherous
Example
The treacherous terrain made it difficult to climb the mountain. [treacherous: adjective]
Example
He was a treacherous friend, always spreading rumors and betraying confidences. [treacherous: adjective]
Good things to know
Which word is more common?
Treacherous is more commonly used than perfidious in everyday language. Treacherous is a versatile word that can be used to describe a wide range of situations, while perfidious is less common and has a more formal connotation.
What’s the difference in the tone of formality between perfidious and treacherous?
Perfidious is a more formal word that is often used in literature or academic writing. Treacherous is more versatile and can be used in both formal and informal contexts.
