Cooperator : সহকর্মী; সহযোগী;
Related Words
co-operator  cooperator  coverture  See Words Also In
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Appropriate Prepositions
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
Noted for (বিখ্যাত): She is noted for dancing.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
Remind of (স্মরণ করিয়ে দেওয়া): He reminded me of his request to lend him some money.
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Idioms
In vogue (চালু): This custom is not in vogue at present.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Run high (বেড়ে যাওয়া) —The price of everything has run high.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.
Well up (সুপন্ডিত)- Dr. Shahidullah was well-up in Bengali language.