Collaborations : সাহায্য; সহযোগিতা;
Related Words
calibrating  celebrating  celebrations  collaborating  collaborationist  collaborations  See Words Also In
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Appropriate Prepositions
Call for(চাওয়া): I will call for his explanation.
Change into (পরিবর্তিত হওয়া): At what point does boiling water change into vapor.
Contribution to (অবদান): His invention made a major contribution to road safety.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Refer to (সিদ্ধান্তের জন্য প্রেরণ করা): The matter was referred to the Chairman for a decision.
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Idioms
On the whole (মোটের ওপর): On the whole, his conduct is good.
Out of date (সেকেলে): This fashion is out of date.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Up to (পর্যন্ত) - I have done the exercises up to page 40.
Wild goose chase (useless pursuit, পন্ডশ্রম) —Do not waste time in wild goose chase.