perfidia.
perfidy (act of violating faith or allegiance)
Meaning & usage
perfidy (act of violating faith or allegiance)
Where this word comes from
Etymology tree Proto-Indo-European *per- Proto-Italic *per Latin per Proto-Indo-European *bʰeydʰ-der. Latin fidēs Proto-Indo-European *-ós Proto-Indo-European *-os Proto-Indo-European *-ós Proto-Indo-European *-ós Proto-Indo-European *-ós Proto-Indo-European *-ós Proto-Indo-European *-os Proto-Italic *-os Archaic Latin -os Latin -us Latin perfidus Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ia Latin perfidialbor. Polish perfidia Learned borrowing from Latin perfidia.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.