perfidiousness
- noun
- /pərˈfɪdʒəsnəs/
- Formal
:
perfidia
- The perfidiousness of her actions left a lasting impact on their relationship, eroding trust completely.
Examples
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His perfidiousness was evident when he betrayed his closest friend for personal gain.
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During the investigation, the detective uncovered the perfidiousness of the suspect's plot against the company.
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This short historical overview will demonstrate the importance and perfidiousness of Jewry and its animosity toward the founder of Islam, the Prophet Muhammad.
Academic text (2015)
Synonyms
197
3.9
An act of not being loyal to someone, for example telling their secrets or helping an enemy
46
7.5
To betray someone's trust or loyalty
13
4.1
Not supporting a person, group, or cause who trusts you
4
9.9
A dishonest act that breaks someone's trust
1
6.1
Not being loyal to a partner, for example having a secret romantic or sexual relationship
1
7.7
Not being loyal or keeping promises to people who trust you
Being disloyal to your country, friends, or cause
The act of betraying your country or people by helping their enemies
Lack of loyalty that breaks trust between people
Antonyms
How Treacherous
Surface Forms
Morphology
perfidiousness = perfidious (transparent) = perfidious + ness
Standard nominalization formed by adding '-ness' to an adjective, producing 'the state or quality of being perfidious', which is directly predictable from the adjective.
Etymology
Perfidiousness comes from the Latin parts per- and fid, where fid means 'faith' and appears in familiar words like fidelity and 'faithful', while per- gives a sense of 'against' or 'away'. So perfidiousness is the quality of turning against faith—betrayal or being untrustworthy.