Definition of perfidious in English:

perfidious

Syllabification: per·fid·i·ous
Pronunciation: /pərˈfidēəs
 
/

adjective

literary
Deceitful and untrustworthy: a perfidious lover
More example sentences
  • She is indifferent, negligent, unfeeling, untrustworthy, and perfidious.
  • If anyone in history has ever emitted a bigger pile of oozing, sanctimonious, unctuous, fetid, perfidious, malodorous offal than this, I'd like to know what it could possibly be.
  • The cause of these antinomies is language, for language, being a useful tool, is also a self-locking instrument - and at the same time a perfidious one, since it tells nothing about when it becomes a pitfall itself.
Synonyms

Origin

late 16th century: from Latin perfidiosus, from perfidia 'treachery'.

Derivatives

perfidiously

adverb

Definition of perfidious in:

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Pronunciation: ɪˌnaməˈrɑːtə
noun
a person's female lover