Choose the word most similar in meaning to the given word.
Treacherous

Synonyms: Untrustworthy (অবিশ্বাসযোগ্য), Disloyal (অবাধ্য; বিশ্বাসঘাতক), Unfaithful (অবিশ্বস্ত), Treacherous (বিশ্বাসঘাতক), Untrusty (বিশ্বাসযোগ্য নয় এমন)।
Antonyms: Faithful (বিশ্বস্ত), Loyal (বিশ্বাসী ও অনুগত), Firm (দৃঢ়), Trustworthy (বিশ্বস্ত), Reliable (নির্ভরযোগ্য)।
Other Forms: 
- Perfidiously (adverb)
- Perfidiousness (noun)
Example Sentence: 
1. She described the new criminal bill as a perfidious attack on democracy.
2. The Perfidious people always find way to deceive others. 

Source: Website Lecture