perfidy
n. துரோகம், நயவஞ்சகம், நம்பிக்கை மோசம்.
Per"fi*dy, n.; pl. Perfidies. Etym: [L. perfidia, fr. L. perfidus faithless; per (cf. Skr. para away) + fides faith: cf. F. perfidie. See Faith.] Defn: The act of violating faith or allegiance; violation of a promise or vow, or of trust reposed; faithlessness; teachery. The ambition and perfidy of tyrants. Macaulay. His perfidy to this sacred engagement. DeQuincey.