1. perfidious: adjective
definition:
deliberately faithless
deceitful & untrustworthy

2. perfidious
pronunciation:
per-fid-ee-uh s

3. perfidious synonyms: treacherous deceitful traitorous false disloyal
unfaithful
duplicitous

4. perfidious
Related forms:
adverb
perfidiously
noun
perfidiousness

5. perfidious
The perfidious politician accepted bribes for political favors.

6. perfidious
Jafar is a perfidious schemer who tries to destroy anyone who interferes with his plans to take over the kingdom.

7. perfidious
People must safeguard their accounts against perfidious computer hackers.

8. perfidiously
Some people believe that the government perfidiously ignores the needs of the homeless.

9. perfidiously
Mufasa’s brother Scar perfidiously schemes to take control of the pride in The Lion King.

10. perfidiousness
Sadly, the perfidiousness of cheating can insidiously erode integrity.

11. perfidiousness
Ursula, the villain in The Little Mermaid, is known for her perfidiousness.