treachery

Definitions

Betrayal of trust; deceptive action or nature.

The act of violating allegiance or faith, especially toward a sovereign or friend.

Examples

The king was overthrown by the treachery of his closest advisors.

She could not forgive the treachery of her business partner who stole her ideas.

Synonyms

betrayal disloyalty perfidy deceit treason duplicity infidelity

Antonyms

loyalty faithfulness allegiance fidelity honesty trustworthiness devotion