perfidious


per·fid·i·ous

adjective \(ˌ)pər-ˈfi-dē-əs\

: not able to be trusted : showing that someone cannot be trusted

Full Definition of PERFIDIOUS

:  of, relating to, or characterized by perfidy
per·fid·i·ous·ly adverb
per·fid·i·ous·ness noun

Examples of PERFIDIOUS

  1. We were betrayed by a perfidious ally.
  2. <a perfidious campaign worker revealed the senator's strategy to his leading rival for the nomination>

First Known Use of PERFIDIOUS

1572

Rhymes with PERFIDIOUS

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