Effective : ফলপ্রদ; কার্যকর; বলবৎ
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Appropriate Prepositions
Admit of(স্থান করা, সুযোগপ্রাপ্ত হওয়া): His offence admits of no explanation.
Appeal to, for(কোন ব্যক্তির কাছে কোন কিছুর জন্য আবেদন করা): The flood affected people appealed to the President for reef.
Catch at(ধরা): A drowning man catches at a straw.
Certain of(নিশ্চিত): Jamal is certain of his success.
Look over (পরীক্ষা করা): He was looking over the answer scripts.
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Idioms
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
At random (indiscriminately—এলোপাথাড়ি-adv.) He talks at random like a mad man.
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Pandora’s box (আপাতঃ দৃষ্টিতে ভালো মনে হলেও আসলে ভালো নয়)—His words proved to be Pandora’s box.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.