Assurance : নিশ্চিতকরণ;
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assurance  assurances  assuring  assyrians  See Words Also In
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Appropriate Prepositions
Acquit of (অব্যাহতি দেয়া): The chief justice acquitted him of the charge of murder.
Appoint to(নিযুক্ত করা/হওয়া): Kibria has been appointed to the post of Headmaster.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
Short of (অপর্যাপ্ত): I am running short of money.
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Idioms
As ill-luck would have it (unfortunately- দুর্ভাগ্যবশত) A child was born to them but, as ill-luck would have it, it died when it was eight days old.
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Fall flat (ফলপ্রসূ না হওয়া): This business is going to fall flat.
Learn by heart (মুখস্থ করা)— He learnt the poem by heart.
Well off (স্বচ্ছল) - Jim and Della were not well off.