Inefficient : অনিপূণ; অযোগ্য; অপটু
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Appropriate Prepositions
Agree with, on, to(একমত হওয়া): My father agreed with me on this point, but he did not agree to my proposal to set up a canteen.
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Complain about (কোনো বিষয়ে নালিশ করা): They complained about the mismanagement of the programme.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Remind of (স্মরণ করিয়ে দেওয়া): He reminded me of his request to lend him some money.
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Idioms
End in smoke (ব্যর্থ হওয়া): All his plans ended in smoke.
Milk and honey – (প্রাচুর্য)- He lives with milk and honey.
Red tape (official formalities, অফিসের কাজ)— You would not believe the red tape involved in getting the required permits.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
To the point (সঠিক) - The boy answered the question to the point.