un perfidious

perfidious

[per-fid-ee-uhs]
adjective
deliberately faithless; treacherous; deceitful: a perfidious lover.

Origin:
1590–1600; < Latin perfidiōsus faithless, dishonest. See perfidy, -ous

perfidiously, adverb
perfidiousness, noun
unperfidious, adjective
unperfidiously, adverb
unperfidiousness, noun


false, disloyal; unfaithful, traitorous.


faithful.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
perfidious (pəˈfɪdɪəs)
 
adj
guilty, treacherous, or faithless; deceitful
 
per'fidiously
 
adv
 
per'fidiousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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