Pentagonal : পঁচভুজ; পঁচকোণী; পঞ্চভূজযুক্ত পঞ্চকোণী;
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Appropriate Prepositions
Admit into(প্রবেশ করতে দেওয়া): Only the selected people were admitted into the theater.
Curse for (অভিশাপ দেয়া): If he ever mistreats my parents, I will certainly curse him for it.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
Play on (বাজানো): They play on the piano.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
At-fault (guilty-কিংকর্তব্যবিমূঢ়, অপরাধ, দোষ adj.) You are at fault.
In black and white – (লিখিতভাবে) – Put forward your proposal in black and white.
To the utmost (যথাসাধ্য) - I tried to the utmost of my ability to have a job.
Take into account (বিবেচনা করা): Your activities should be taken into account.
Up and doing (উদ্যোগী): Be up and doing and then you will succeed in your life.