As firm as a rock : অটল; অচল; অনড়;
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Appropriate Prepositions
Adorn with(সাজানো/সজ্জিত করা): Adorn the car with flowers.
Close to(নিকটে): Our College is close to the Post Office.
Die for (আত্নত্যাগ করা): Our Chairman died for our country.
Inquire for (দেখা করতে চাওয়া): He inquires for the manager.
Match for (প্রতিদ্বন্দ্বী): He is no match for me.
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Idioms
Fair play (প্রতারণা বিহীন নীতি বা কাজ): I believe in the practice of fair play in my business.
Give in (বশ্যতা স্বীকার করা): We will never give in to our enemies.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
Pave the way (সুপ্রসন্ন করা) – I am sure I can pave the way for your success.
Set something right (ঠিক করা)— He will set the machine right.