Last Updated:2025/11/22
(rare) Unfaithfulness; deceitfulness; perfidy.
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perfidiousness
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Source Word
perfidiousness
Noun
rare
uncountable
usually
Japanese Meaning
不忠実、裏切り(unfaithfulness) / 欺瞞、詐欺(deceitfulness) / 裏切り、背信(perfidy)
Sense(1)
( plural )