In the course of : চলা কালে; ব্যাপিয়া;
Related Words
in the course of  in the course of time  See Words Also In
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Appropriate Prepositions
Anxious about (কোনো কিছুর ব্যাপারে চিন্তিত বা উদ্বিগ্ন): Karim is anxious about his father’s death. Karim is anxious for getting a job.
Appear at/in(উপস্থিত হওয়া): I should appear at/in the exam hall in time.
Die by (দূর্ঘটনা বা অপঘাতে মরা/কোন কিছু দ্বারা মারা যাওয়া): He died by a road accident.
Entrust with (কোনো কিছু দ্বারা কাউকে বিশ্বাস করে): He entrusted me with the thing.
Indispensable to (অত্যাবশ্যকীয়): Your help is indispensable to him.
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Idioms
At liberty (free-মুক্ত-adj.) They are at liberty to go anywhere.
Do yeoman’s service (বিশেষ উপকার করা): Freedom fighters have done yeoman’s service for country.
Make head or tail – (মাথামুন্ডু বুঝা) – I cannot make head or tail of what you say.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.
Weal and woe (সুখ-দুঃখ): Human life is full of weal and woe.