Standard Lemma guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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No pronunciation record was provided for this word.
noun
Unfaithfulness; deceitfulness; perfidy.
Definition source: English Wiktionary via Wiktextract
Usage: rare, uncountable, usually
No example sentence was provided for this meaning.
Synonyms: double-dealing, treachery, treacherousness, betrayal, breach of promise, breach of trust, Judas kiss, perfidiousness, perfidy, prodition, Punic faith, stab in the back, swike, tergiversation, traitory, treason
Antonyms: none provided
noun
betrayal of a trust
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: perfidy, treachery
Antonyms: none provided
Broader terms: disloyalty
Narrower terms: insidiousness
History
Etymology tree English perfidious Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English perfidiousness From perfidious + -ness.
