Investigates : তদন্ত করা; তদারক করা; অবেক্ষণ করা; অন্বেষণ করা; খুঁজা;
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Appropriate Prepositions
Averse to (বিমুখ): Rahim was averse of your various problems.
Aware of(অবগত): I am not aware of his dishonesty.
Care of(যত্ন নেওয়া): You should take care of your health.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
Refrain from (বিরত রাখা বা থাকা): I refrained him from smoking.
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Idioms
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Of course (অবশ্যই): Of course, you know what that meant.
Read between the lines (understand the significance, অন্তনিহিত অর্থ বুঝা) Try to read between the lines of the letter.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.
With might and main (যথা শক্তি দিয়ে) —He tried with might and main to help me.