Null and void : অকার্যকর; বাতিল; খারিজ; বৈশিষ্ট্যহীন; আইনত কার্যকর নয়;
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Appropriate Prepositions
Close to(নিকটে): Our College is close to the Post Office.
Defend against (রক্ষা করা): We will defend our country against all enemies.
Fantasize about (কল্পনা করা): They fantasized about winning the lottery.
Indulge in (আসক্ত): You should not indulge in social media.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
Head and ears (সম্পূর্ণরূপে): He is over head and ears in debt.
Lame excuse (বাজে ওজর): The lame excuse will not do.
Round the clock (সমস্ত দিন): He is working round the clock.
Set something right (ঠিক করা)— He will set the machine right.
Speed money (ঘুষ; উৎকোচ): He hankers after speed money.