Sworn enemy : পরম বা আপসহীন শত্রু;
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Appropriate Prepositions
Burst into(কান্নায় ভেঙ্গে পড়া): He burst into tears.
Count upon(নির্ভর করা): He always counts upon your help for this work.
Desist from (বিরত থাকা): She desisted from making this.
Detrimental to (অপকারী): Smoking is detrimental to health.
Solution to (সমাধান): None can solution to every problem.
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Idioms
A bed of roses - (সুখকর অবস্থা): Life is not a bed of roses.
In lieu of (পরিবর্তে): Give me this pen in lieu of that.
Part and parcel (অবিচ্ছেদ্য অংশ): Education is part and parcel to build a civilized nation.
Pick one’s pocket (পকেট মারা)— He tried to pick my pocket.
With the sweat of one’s brow (মাথার ঘাম পায়ে ফেলে) — He earns his livelihood with the sweat of his brow.