Demography : জনসংখ্যা; জনতত্ত্ব;
Related Words
demo graphy  demographer  demographic  demography  See Words Also In
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Appropriate Prepositions
Afraid of(ভীত): An honest man is not afraid of telling the truth.
Cast aside (ছুঁড়ে ফেলা): As soon as they become rich they cast aside their poor friends.
Famous for (বিখ্যাত): Smith is famous for his wisdom.
Object to (প্রতিবাদ করা): Many people objected to the remarks of the leader.
Relevant to (প্রাসঙ্গিক): Your answer is not exactly relevant to my question.
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Idioms
Bear in mind (remember— মনে রাখা —V): You should also bear in mind the additional costs of the mortgage.
Right and left (এলোপাথাড়ি - indiscriminately): He planted trees right and left.
Show good manner (ভালো আচরণ প্রদর্শন ): You should show good manner in the company of young ladies.
Take to heart (মর্মাহত হওয়া)- He really took it to heart when I asked him to reconsider.
Ups and downs (উত্থান পতন): There are ups and downs in a man’s life.