Ungratefulness : কৃতঘ্নতা;
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Appropriate Prepositions
Abhorrent to(ঘৃণ্য): Racism of any kind is abhorrent to me.
Abide by(মেনে চলা): We must abide by the rules of discipline.
Consist in (কোনো কিছু মধ্য বিদ্যমান থাকা): Happiness consists in contentment.
Convinced of (আশ্বস্ত): You are convinced of his product.
Run over (চাপা পড়া): The man was run over by a truck.
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Idioms
Bad names (গালমন্দ—n) He called the man bad names.
Eat humble pie (অপমান হজম করে ক্ষমা চাওয়া): The manager had to eat humble pie before his employees.
Fair and square (সৎ): The learned persons should be fair and square.
Ups and downs (উত্থান পতন)- There is ups and downs in a man's life.
White elephant (অত্যন্ত ব্যয়সাপেক্ষ বিলাসিতা): At last the department proved to be a white elephant.