Corner-stone : প্রধান ভিত্তি প্রস্তর;
Related Words
corner-stone  cornerstone  cornerstones  See Words Also In
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Appropriate Prepositions
Adept in (দক্ষ): He is adept in playing football.
Adhere to (লেগে থাকা, অটল থাকা): You should adhere to your principal.
Burdened with (ভারাক্রান্ত): Rahim is burdened with a big family.
Convinced of (আশ্বস্ত): You are convinced of his product.
Qualified for (যোগ্য প্রতিপন্ন হওয়া): No candidate was properly qualified for the post.
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Idioms
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Let loose (বল্গাহীনভাবে ছেড়ে দেয়া): He let his horse loose in the field.
Liable to mislead (প্রতারণাপূর্ণ- deceptive): Appearances can often be liable to mislead.
Lose one’s heart (প্রেমে পড়া) — He lost his heart to the girl.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.