Perfidious in a sentence as an adjective

The "perfidious Albion" stereotype would seem to apply here.

I'd think that those perfidious Englishfolks would have been loathe to borrow French terms specifically during that period...

He was also deemed to be "oppressive and unjust ... [a] sanguinary tyrant, [and a] perfidious negotiator".It was, in short, time to take out Tipu Sultan of Mysore.

This is just a perfidious argument that data tracking companies use to ridicule the law.> Could it simply be that, most businesses put cookie popups on their sites because they don't want to get fined?

But that's only because they're in the better bargaining position as the only source for the movie -- it's leveraging the copyright monopoly into perfidious control over the device market.

If a mature and well-funded site like Wikipedia can’t distinguish between reason and perfidious slander, if it punishes volunteers who enforce its own policies against libel, then who will trust any publication that doesn’t bear the brand of ABC/Disney, Reuters, or Al-Jazeera?

Perfidious definitions

adjective

tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans; "Punic faith"; "the perfidious Judas"; "the fiercest and most treacherous of foes"; "treacherous intrigues"

See also: punic treacherous