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1
the act of intentionally betraying someone or something's trust in one
- The generals considered the unauthorized negotiations with the enemy a clear act of perfidy.
- The friendship suffered a severe blow due to perfidy, as confidential secrets were revealed.
- The business partnership ended in perfidy when one partner secretly established a competing venture.
- The historic treaty violation marked an egregious perfidy between the two nations.
2
the state of lacking faithfulness and loyalty
- The knight's perfidy shocked the kingdom, as he betrayed his sworn allegiance to the king.
- The employee's perfidy was revealed when confidential company information was leaked to competitors.
- The novel's plot unfolded with a twist of perfidy, as the protagonist's closest friend turned out to be a traitor.
- The spy's perfidy jeopardized the mission, as classified information fell into the wrong hands.
- The political leader's perfidy became apparent when he allied with rival parties after promising unwavering loyalty.
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