Inefficiencies : অদক্ষতা; অকর্মণ্যতা; অকার্যকরতা; অকৃতিত্ব; কমি;
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inefficiencies  inefficiency  See Words Also In
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Appropriate Prepositions
Abide by(মেনে চলা): We must abide by the rules of discipline.
Arrange for(ব্যবস্থা করা): We have arranged everything for our study tour.
Bar to(বাধা): Poverty is not a bar to happiness.
Concerned for (উদ্বিগ্ন): The parents are concerned for their growing children.
Monument to (স্মৃতিসৌধ): The monument to your right is a popular tourist attraction.
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Idioms
Bear in mind (মনে রাখা): Always bear in mind that you are a daughter of a reputed person.
For good (চিরদিনের জন্য): He left the house for good.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Through and through (পুঙ্খানুপুঙ্খু রুপে)- He read the poem through and through.
Up to (পর্যন্ত) - I have done the exercises up to page 40.