Switchover : পক্ষপরিবর্তন;
Related Words
switch over  switchboard  switchover  See Words Also In
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Appropriate Prepositions
Contribution to (অবদান): His invention made a major contribution to road safety.
Decide upon (সিদ্ধান্ত করা): We have not yet decided whether we are going to picnic.
Entrust to (কাউকে কোনো কিছু বিশ্বাস করে দেওয়া): He entrusted the thing to me.
Indispensable to (অত্যাবশ্যকীয়): Your help is indispensable to him.
Infested with (অতিষ্ঠ): The room is infested with rats.
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Idioms
Bring to book (reproach-Start- ভর্ৎসনা করা) The father brought his son to book for his failure in the exam.
Null and void (বাতিল): The deed has been null and void now.
Sheet anchor (শেষ আশ্রয়; প্রধান অবলম্বন; আসল খুঁটি)— This small piece of land is his sheet anchor.
To the backbone (হাড়ে হাড়ে): I know this boy to the backbone.
Tooth and nail (strongly, প্রবলভাবে)-He fought tooth and nail against his enemy.