Raison d’etre : কোনও জিনিসের অস্তিত্বের কারণ;
Related Words
raison dêtre  raison d’etre  See Words Also In
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Appropriate Prepositions
Ascend from (উপরে ওঠা): Rahim watched the mist ascending from the valley.
Burst out a laughter(হাসিতে ফেটে পড়া) He bursts out a laughter.
Call on(কারও সাথে দেখা করা): I called on him in his office.
Contrary to(বিপরীত, পরিপন্থী): Students should not act contrary to the rules of discipline.
Hit upon (পরিকল্পনা নেয়া): Rahim hit upon a new plan.
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Idioms
At the top of (শীর্ষে): The boy shouted at the top of his voice.
Cut to the quick (মর্মাহত হওয়া): I was cut to the quick by his birds.
Follow the footsteps of (পায়ে পায়ে অনুসরণ করা): People always follow the footsteps of some great man.
Red letter day (স্মরণীয় দিন): The 16th December is a red letter day for us.
Three R's (প্রাথমিক শিক্ষা)— He has not yet learnt the three R's.