perfidiousness
nounEtymology From perfidious + -ness.
1
Rare, Usually Unfaithfulness; deceitfulness; perfidy.
- Not only Cato is vanquished by Caesar, but the treachery and perfidiousness of Syphax prevail over the honest simplicity and the credulity of Juba.1781, Samuel Johnson, “Addison”, in Lives of the Poets:
- Related terms
- perfidious, perfidiously