Perfidiousness : অবিশ্বস্ততা;
Related Words
perfidiousness  propitiousness  See Words Also In
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Appropriate Prepositions
Annoyed with(ব্যক্তির সাথে বিরক্ত হওয়া): I am annoyed with him.
Convict of(দোষী সাব্যস্ত হওয়া): The accused person was convicted of the murder.
Die of (রোগে মরা): Many people died of cholera.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Take pity on (দয়া করা): Take pity on the helpless people.
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Idioms
All along - (সব সময়): I was present in the meeting all along.
At a discount (অনাদৃত) Female education is no longer at a discount now.
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Fight shy (এড়িয়ে চলা): Why do you fight shy of your teacher?