All is lost, for the sake of that inveigling, perfidious young Syren.
The czarina was strong-minded, but neither cruel nor perfidious.
The sea is a perfidious element, but what is it to the blind malevolence of men?
An English poet has said of woman, 'Perfidious as the waves,' my son.
On one was a satire on the hypocritical rapacity of perfidious Albion.
But thou, detestable ...