perfidiae

perfidiae is a Latin form of perfidia, meaning “treachery, faithlessness”. It is the nominative plural feminine noun or vocative plural feminine noun or dative singular feminine noun or genitive singular feminine noun.

Found 50 times in the Latin texts on Socratos.

Where it is used

Caesar, De Bello Civili 2.16: … quae VIX longinquo spatio refici non posse sperassent, paucorum dierum opera et labore ita refecta, ut nullus perfidiae neque eruptioni locus esset nec quicquam omnino relinqueretur, qua aut telis militibus aut igni operibus noce …

Ovid, Heroides 6.146: Perfidiae pretio qua nece dignus eras?

Plautus, Asinaria 3.2.545: Perfídiae laudes grátiasque habémus merito mágnas,

All forms of perfidia (declension table)

Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Lewis & Short, A Latin Dictionary (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.