Authenticity : সত্যতা; প্রামাণ্য; বিশ্বাসযোগ্যতা; অকৃত্রিমতা; প্রামাণিকতা; নির্ভেজালত্ব;
Related Words
authentic text  authenticate  authenticated  authenticates  authenticating  authenticity  See Words Also In
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Appropriate Prepositions
Argue against (বিপক্ষে বলা): She argued against the bill.
Assure of(আশ্বাস দেওয়া): I can assure you of the Principal’s honesty.
Careless of(অসতর্ক): Do not be careless of your health.
Debar from (বঞ্চিত হওয়া/বাধা দেওয়া): He is debarred from getting a job.
Due to (কারণে): His absence is due to illness.
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Idioms
Hush money (ঘুষ): He offered a hush money to disclose the file.
Silver tongue (মিষ্টভাষী)- He is a man of silver tongue.
Stone’s throw (অতি নিকটে): Our school is at a stone’s throw from our house.
Scapegoat (উদোর পিন্ডি বুধোর ঘাড়ে)—He was made scapegoat of the incident.
Up-to-date (আধুনিক) - Now-a-days ladies are very up to date.