Rudiment : মূলনীতি, সূত্র বা তত্ত্ব;
Related Words
radiant  radiometer  red meat  rodent  rodents  rudiment  rudimental  rudimentary  rudiments  See Words Also In
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Appropriate Prepositions
Consolidate for (শক্তিশালী করা): The four new companies consolidated for greater efficiency.
Count on/upon (নির্ভর, বিশ্বাস করা): Rahim count on (upon) my help.
Eager for, about (একাগ্র): The students for this school are eager for knowledge. The teacher is eager about the success of his students.
Faithful to (বিশ্বস্ত): The dog is very faithful to its master.
Look for (খোঁজা): I was looking for the lost phone.
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Idioms
All at once - (হঠাৎ): I feel terribly sleepy all at once.
Fish in a troubled water (এলোমেলো অবস্থার সুযোগ নেয়া): He made a lot of money by fishing in a troubled water.
Kith and kin (নিকট আত্মীয়): He has no relation with his kith and kin.
Of course (অবশ্যই): Of course, you know what that meant.
Through thick and thin (through all difficulties, সমস্ত সমস্যার মধ্যে)-Ruma followed her husband through thick and thin.