Costliest : ব্যয়বহুল; মহার্ঘ; আক্রা; মূল্যবান্; বহুব্যয়সাপেক্ষ; অক্রেয়; অগ্নিমূল্য; ডাগর;
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Appropriate Prepositions
Adhere to (লেগে থাকা, অটল থাকা): You should adhere to your principal.
Call for(চাওয়া): I will call for his explanation.
Convince of(বিশ্বাস হওয়া): I am convinced of your efficiency.
Look up (ডিকশনারি থেকে শব্দার্থ খোঁজা): He is looking up a new word meaning from dictionary.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
At every step (প্রতি পদে পদে): There are dangers at every step in our life and yet we want to live.
As a rule (নিয়ম অনুসারে.) As a rule, she kept silent in the meeting.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
Under age (অপ্রাপ্ত বয়স্ক)- He could not cast his vote because he was under age.