Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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perfidious

per·fid·i·ous

perfidious

 
pronunciation:
pr fI di s
features:
Word Combinations (adjective), Word Parts
part of speech: adjective
definition: purposely disloyal or treacherous; faithless.
You cannot trust such a perfidious rogue, a man who would betray even his best friend!
antonyms:
faithful
similar words:
disloyal
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derivations: perfidiously (adv.), perfidiousness (n.)
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