This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Willful betrayal of fidelity, confidence, or trust; perfidy.

n. The act or an instance of such betrayal.

n. Deliberate, often calculated, disregard for trust or faith.

n. The act of violating the confidence of another, usually for personal gain.

n. Treason.

n. Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy; treason.

n. Violation of allegiance or of faith and confidence; treasonable or perfidious conduct; perfidy.

n. Synonyms See perfidious.

n. betrayal of a trust

n. an act of deliberate betrayal

"This determined man, whose experience in the East Indies was of long date, and who had already served as director-general, came into his new office with an intense prejudice against the English, and with a firm resolve to put an end to what he described as their treachery and intrigues."

treacherous    tricky    treacher    trick    trickster   

perfidy    treason    faithlessness    traitorousness    infidelity    falsity    falseness    recreancy    prodition    treacherousness   

cruelty    cowardice    deceit    ingratitude    treason    wickedness    hypocrisy    fraud    oppression    malice