Perforators : ছিদ্রকারী; বিদ্ধ করার যন্ত্র; ছিদ্র করার যন্ত্র; আগর;
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perforators  proprietors  See Words Also In
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Appropriate Prepositions
Angry for (কোন কাজে রাগান্বিত হওয়া): Rahim was angry with me for my having done this.
Concentrate on(কেন্দ্রীভূত করা): Try to concentrate your attention on your studies.
Look for (খোঁজা): I was looking for the lost phone.
Make from (কোনো উপকরণ দ্বারা সরাসরি তৈরী নয় বোঝাতে): Paper is made from bamboo.
Short of (অপর্যাপ্ত): I am running short of money.
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Idioms
Bring to light (disclose-প্রকাশ করা) The police brought the secret to light.
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Get rid of (মুক্তি পাওয়া): Try to get rid of the rogue.
To play on a fiddle (অনর্থক সময় নষ্ট করা - To waste time)-He played on a fiddle by nature.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.