Definition of "perfidiousness" [per•fid•i•ous•ness]
Unfaithfulness; deceitfulness; perfidy.(noun)
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Use "perfidiousness" in a sentence
"They gave the officers to understand that far from wishing to act as enemies, they were willing to afford the shipwrecked people all the assistance in their power; but these barbarians shewed, on all occasions, a perfidiousness which is peculiar to the inhabitants of these climates; when the brig had sent biscuit on shore, they seized the half of it, and a few moments after, sold it at an exorbitant price, to those from whom they had stolen it."
"Reagan harped on the perfidiousness of big government every chance he got, no matter the specific occasion."
"The mismanagement, secrecy and outright graft of the last administration amount to levels of perfidiousness that are tough to match in any administration."