Decontamination : বিশুদ্ধতা; পরিষ্করণ; পরিপাটিতা; পরিচ্ছন্নতা; সংক্রমণমোচন;
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Appropriate Prepositions
Convert to(দীক্ষিত): Tom is converted to another religion.
Fond of (প্রিয়/অনুরাগী): Children are fond of sweets.
Good for, at (ভাল): This man is good for nothing. He is good at English.
Hostile to (বিরোধী বা বিরূপ ভাবাপন্ন): Nobody is hostile to you.
Taste of (স্বাদ; অভিজ্ঞতা): They have had some taste of problems.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Fair and square (সৎ): The learned persons should be fair and square.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Weal and woe (joy and sorrow, সুখ দঃখ) —Human life is full of weal and woe.