Definition

The quality of being unfaithful or deceitful, especially in a way that betrays trust.

Example

His perfidiousness led to the downfall of the organization, as no one could trust him anymore.

Conversation

I can't believe he would betray us like that.

Yeah, his perfidiousness really shocked me.

It's hard to trust someone after they've shown such deceit.

Absolutely! It makes you question everyone around you.

Synonyms & Antonyms

Root Explanation

Perfidiousness is formed from "perfidus" (from Latin, meaning treacherous or deceitful) and the suffix "-ness" (meaning the state or quality of). The word refers to the state of being treacherous or deceitful.

Memory Tip

Think of the Latin root 'perfidus' which means treacherous, and remember that 'perfidiousness' describes the quality of being treacherous.

Visually Confused Words