Plano-concave : সমাবতল;
Related Words
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Appropriate Prepositions
Abound with(ছেয়ে থাকা): They live in a region that abounds with oil.
Cause for (চিন্তিত হওয়ার কারণ): He has never given me any cause for concern.
Cure of, for(রোগমুক্ত হওয়া): This man was cured of This drug is a cure for typhoid.
Infested with (অতিষ্ঠ): The room is infested with rats.
Popte in, to (মার্জিত): We must be popte in our dealings. One should be popte to
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Idioms
At times (মাঝে মাঝে): He at times comes here.
Round the clock (সমস্ত দিন): He is working round the clock.
Seventh heaven – (মহাখুশী) – I was in the seventh heaven when I heard the news of my BCS final result.
To go to the dogs (গোল্লায় যাওয়া)- He has gone to the dogs by keeping evil company.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.