From time immemorial : স্মরণাতীত কাল হইতে;
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Appropriate Prepositions
Astonished at(বিস্ময়-বিহবল হওয়া): We were astonished at his unexpected success.
Contribution to (অবদান): His invention made a major contribution to road safety.
Enter into (কোনো কিছুতে আবদ্ধ হওয়া): pma entered into a new agreement.
Guard from/against (রক্ষা করা): My parents always guard me from/against bad people.
Refer to (সিদ্ধান্তের জন্য প্রেরণ করা): The matter was referred to the Chairman for a decision.
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Idioms
At dead of night (গভীর রাতে) The police caught the thief at dead of night.
Birds of a feather (persons of like disposition-একই পর্যায়ের লোক) Bird’s of a feather flock together.
Bad blood - (শত্রুতা): There has always been bad blood between these families.
Hush money (ঘুষ): He offered a hush money to disclose the file.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.