perfidy

Definitions

The state of being deceitful and untrustworthy.

An act or instance of deliberate treachery or betrayal.

Examples

The soldier was court-martialed for his perfidy in leaking classified intelligence to the enemy.

She could not forgive the perfidy of her business partner, who had secretly sold their shared assets behind her back.

Synonyms

treachery betrayal disloyalty deceit faithlessness duplicity infidelity

Antonyms

loyalty faithfulness fidelity honesty trustworthiness allegiance devotion