Airshaft : খনি মধ্যে বাতাস ঢোকানর জন্য পথ;
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Appropriate Prepositions
Alarm at, by, for(আশংকা করা/শঙ্কিত হওয়া): I was not alarmed at/by the news, but I was alarmed for their safety.
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Bark at(ঘেউ ঘেউ করা): The dog is barking at the strange woman.
Drop to (নিচে নামানো): Asif dropped his voice to a whisper.
Perfect for (সঠিক, মানানসই): The new book is perfect for you.
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Idioms
At ease (in peace or pleasure – শান্তিতে বা আরামে) A man who has enemies can not live at ease.
Let loose (বল্গাহীনভাবে ছেড়ে দেয়া): He let his horse loose in the field.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
Sheet anchor (শেষ আশ্রয়; প্রধান অবলম্বন; আসল খুঁটি)— This small piece of land is his sheet anchor.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.