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perfidious
01
relating to someone or something that is untrustworthy and disloyal
perfidious
adj
perfidy
n
perfidiously
adv
perfidiously
adv
perfidiousness
n
perfidiousness
n
Example
The perfidious diplomat pretended friendship while secretly plotting against the alliance.
The novel depicted a perfidious character who deceived everyone around him.
The perfidious actions of the spy jeopardized national security, revealing classified information to enemy forces.
Despite making promises of loyalty, the perfidious advisor betrayed the trust of the royal council.
The perfidious act of spreading false rumors damaged the politician's reputation irreparably.
