Subramanian Swamy

The Indian economy has declined because of the peculiar Indian 'invention' of that perfidious financial derivative called Participatory Notes, or PNs, otherwise known as the crony/crooked facilitator for black-money-based portfolio investment. No other country would think of such a derivative.

Indian Politician

Fidel Castro

NATO's brutal military alliance has become the most perfidious instrument of repression known in the history of humankind.

Statesman

Mikhail Gorbachev

It is better to discuss things, to argue and engage in polemics than make perfidious plans of mutual destruction.

Perfidious has a strong negative tone, often indicating betrayal or moral failing.

Negative Emotion

Often used in literature to add a dramatic effect when describing deceit.

Literary Flair

Best used in formal situations or writing, rather than casual conversation.