Concavity : অবতলতা; খোল; গোলাকার ফাঁপা বস্তুর ভিতর;
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Appropriate Prepositions
Certain of(নিশ্চিত): Jamal is certain of his success.
Convict of(দোষী সাব্যস্ত হওয়া): The accused person was convicted of the murder.
Faith in (বিশ্বাস): I have no faith in him.
Match for (প্রতিদ্বন্দ্বী): He is no match for me.
Sentence to, for (দন্ডাদেশ দেওয়া): He was sentenced to death for murder.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
Laughing stock (হাসির পাত্র)— He is a laughing stock to all.
Salt of the earth (গুরুত্বপূর্ণ ব্যক্তিবর্গ) —The salt of the earth is remembered always.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.