Zero hour : পূর্ব-পরিকল্পিত আক্রমণ ইত্যাদির মূহূর্ত;
Related Words
zero  zero hour  zerohour  See Words Also In
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Appropriate Prepositions
Breakdown of (বিস্তারিত): Here is statistical breakdown of data.
Close to(নিকটে): Our College is close to the Post Office.
Dedicate to (উৎসর্গ করা): His pfe is dedicated to the welfare of the country.
Fit for (যোগ্য): Sabina is not yet fit for marriage.
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
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Idioms
At all (in the least degree – মোটেও না) There is no water at all in the pond.
Dead against (তীব্র বিরোধী - strongly opposed to): I am dead against corruption.
Square meal (পেট ভরা আহার): He is too poor to have a square meal everyday.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.
With a lavish hand (মুক্ত হস্তে)— Give away something with a lavish hand.