Ameliorative : উন্নতি কারক;
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Appropriate Prepositions
Adhere to (লেগে থাকা, অটল থাকা): You should adhere to your principal.
Consist of(গঠিত হওয়া): The committee consists of ten members.
Decide upon (সিদ্ধান্ত করা): We have not yet decided whether we are going to picnic.
Depend on (নির্ভর করা): Presently, the students depend on/upon guide books.
Feed on (খেয়ে বাঁচা): The cow feeds on grass.
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Idioms
Dead against (তীব্র বিরোধী - strongly opposed to): I am dead against corruption.
Fish out of water (অস্বস্তিকর অবস্থা): When he came to the village, he felt like fish out of water.
In cold blood (ঠান্ডা মাথায়): They committed this murder in cold blood.
Lion’s share (বড় মাপের অংশ): He took the lion’s share of the profit.
Turn a deaf ear to (pay no attention, প্রত্যাখান করা) —He turned a deaf ear to my proposal.