At ones wits end : হতভম্ব; ভ্যাবাচাকা;
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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.
Attain to (লাভ করা): He will not attain to his objective so soon.
Convenient to(সুবিধাজনক): The work is convenient to your nature.
Deal in (কোনো কিছুর ব্যবসা করা): They deal in green vegetables.
Dwell in (বাস করা): He dwells in a tall apartment.
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Idioms
At home (comfortable— আরাম) He feels at home in Dhaka now.
Back and forth (to and fro-এদিক ওদিক – adv.) The mad man was walking back and forth in the doctor’s chamber.
Cut to the quick (মর্মাহত হওয়া): I was cut to the quick by his birds.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.