Assure : নিশ্চিত করে বলা;
Related Words
acquire  assure  azure  See Words Also In
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Appropriate Prepositions
Apply to (কারো কাছে আবেদন করা): He applied to the principal for free admission.
Competent for(যোগ্য): He is not competent for the post.
Devoid of (বিহীন/বর্জিত): He is devoid of common sense.
Fit for (যোগ্য): Sabina is not yet fit for marriage.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
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Idioms
Bare word (শুধু মুখের কথা, স্বাক্ষী প্রমানহীন কথা-n) He believed your bare word and now he has been played false with.
End in smoke (ব্যর্থ হওয়া): All his plans ended in smoke.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
To the contrary (against what some one had said, পক্ষান্তরে) —He said nothing to the contrary.