perfidiousness

/pərˈfɪdiəsnəs/
noun
  1. The quality of being dishonest and unable to be trusted; treachery.
    • She could not forgive the perfidiousness of her business partner, who had stolen company secrets.
    • History books often highlight the perfidiousness of leaders who betray their own people.
    • The spy's perfidiousness shocked even his closest colleagues.
What does "perfidiousness" mean? | whatsthatwordmean | whatsthatwordmean