Curvilinear : বক্ররেখা-বেষ্টিত;
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Appropriate Prepositions
Arrive at(উপস্থিত হওয়া, পৌছানো): The train arrived at Dhaka station on time.
Capable of(সক্ষম): He is capable of doing it.
Delighted at/with (আনন্দিত হওয়া): Sharmin was delighted at/with her husband’s promotion.
Dwell upon (আলোচনা করা): They dwell long upon the matter.
Rid of (মুক্তি দেওয়া): He will get rid of troubles soon.
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Idioms
As a whole (মোটের উপর, সম্পূর্ন এক মনে করে-adv.) Look at life as a whole and you will see that it is meaningful.
In vogue (চালু): This custom is not in vogue at present.
Safe and sound (নিরাপদে)— He reached home safe and sound.
Turn down (refuse, প্রত্যাখান করা) —He turned down my proposal.
Well off (স্বচ্ছল) - Jim and Della were not well off.