Crumble up : চূর্ণবিচূর্ণ করা;
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crumble up  crumple up  See Words Also In
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Appropriate Prepositions
Agree with(ব্যক্তির সাথে একমত হওয়া): I agree with you.
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Grateful to (কৃতজ্ঞ): We should be grateful to our teachers.
Heir of (উত্তরাধিকারী): He is the heir of his father.
Similar to (সদৃশ): My T-shirt is similar to yours.
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Idioms
In full swing (পুরোদমে): The school is in full swing after the vacation.
Ins and out (খুঁটিনাটি): I know ins and outs of this file.
Man of straw (অপদার্থ): We do not care for a man of straw like you.
Up-to-date (আধুনিক) - Now-a-days ladies are very up to date.
Without fail (অবশ্যই) - You must attend the meeting without fail.