Per pro : দ্বারা; বদলির দ্বারা;
Related Words
per pro  perfer  periphery  See Words Also In
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Appropriate Prepositions
Catch at(ধরা): A drowning man catches at a straw.
Deaf to, of, in (না শোনা, বধির হওয়া): The boy is deaf to his father’s advice. This man is deaf of/in one ear.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
Quarrel over (কোন বিষয়ে ঝগড়া করা): Do not quarrel over this trifling matter, let it be drop.
Substitute for (বদলে দেওয়া): This action is substitute for that.
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Idioms
Make both ends meet (আয় ব্যয় মেলানো): I cannot make both ends meet with my small income.
Riding for a fall (বেপরোয়াভাবে কাজ করা- to act recklessly): He rides for a fall in the election.
To and fro (hither and thither, এদিক ওদিক)-The man is walking to and fro.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.