Catastrophic : সর্বনাশা; আকস্মিক বিপত্তিমূলক;
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Appropriate Prepositions
Abstain from(বিরত থাকা): I am trying to abstain from sweets for my new diet.
Assure of(আশ্বাস দেওয়া): I can assure you of the Principal’s honesty.
Busy with(ব্যস্ত থাকা): Rahim is now busy with her homework.
Complain to (কারো কাছে নালিশ করা): You should not complain to his parents.
Convinced of (আশ্বস্ত): You are convinced of his product.
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Idioms
Easy and free (অমায়িক): The boy is easy and free, so he has many friends.
Gala day (বিশেষ দিন): The Eid–Ul-Fitr is a gala day for Muslims.
Learn by heart (মুখস্থ করা)— He learnt the poem by heart.
To the point (সঠিক) - The boy answered the question to the point.
Take one to task (rebuke, তিরস্কার করা)— He took me to task for negligence of duty.