Quadrangular : চতুর্ভুজাকার;
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Appropriate Prepositions
Argue over (কোন বিষয়ে তর্ক করা): The kids are arguing over which TV program to watch.
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Beg for(অনুরোধ করা): Maria begged the Superintendent for a seat in the school hostel.
Hope for (আশা করা): Let us hope for the best.
Innocent of (নির্দোষ): The maid servant was proved innocent of the alleged theft.
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Idioms
Carry the day (জয়লাভ করা) The boys carried the day in the debate competition.
Crying need (জরুরী): Mass education is a crying need for India.
Nip in the bud (অঙ্কুরে বিনষ্ট হওয়া): All his hopes were nipped in the bud.
Pack of lies (ডাঁহা মিথ্যা)—He told pack of lies to prove himself innocent.
To the letter (in all details, অক্ষরে অক্ষরে) —Follow my advice to the letter.