Oligarchical : গোষ্ঠীশাসন-সংক্রান্ত;
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Appropriate Prepositions
Agree with(ব্যক্তির সাথে একমত হওয়া): I agree with you.
Attentive to(মনোযোগী): He is attentive to his business.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Devote to (উৎসর্গ করা/নিয়োজিত করা): Students should devote sufficient time to their studies.
Indulge in (আসক্ত): You should not indulge in social media.
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Idioms
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
Make both ends meet (আয় ব্যয় মেলানো): I cannot make both ends meet with my small income.
On the contrary (বিপরীত পক্ষে): I do not hate him; on the contrary I love him.