Cornerstone : ভিত্তি; ভিত্তি-প্রস্তর;
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Appropriate Prepositions
Affectionate to(স্নেহশীল): He is very affectionate to his baby.
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Attend on/upon (সেবা করা): We should attend on/upon the ailing patient.
Based on(প্রতিষ্ঠিত, ভিত্তিক): His information is not based on the correct information.
Enter into (আলোচনা করতে আরম্ভ করা): Let’s not enter into details at this stage.
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Idioms
At death’s door (at the point of death- মৃত্যুর দ্বারে) The patient is now at death’s door.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Round the clock (সমস্ত দিন): He is working round the clock.
To the backbone (to the core, হাড়ে হাড়ে) —The boy is wicked to the backbone.