Pronunciation is a verbal process. Differences in pronunciation may be due to differences in region , time , person , and geographical boundaries. In the course of time, there have been several changes in the pronunciation of Bengali and there have been variations in pronunciation due to various reasons. The standard Bengali pronunciation is considered to be an integrated pronunciation standard of various variations of the spoken Bengali dialect. Below are some rules of Bengali pronunciation - a. If there is an a at the beginning of the word and then if there is e , e , u , e , x , jna , ya -fala or e-kar then the pronunciation of a is like o-kar. Such as - Ati (Oti) , Nadi (Nodi) , Taru (Toru) , Mayur (Moyur) , Paksha (Pokkho) , Yajna (Joggo) , Wild (Bonno) , Smooth (Mosrun). B. When b-fruit is attached to the first consonant of a word, it is not pronounced as b. Such as - skin (Tak) , Swadhikar (Shadhikar) , Dhwani (Dhoni) , Swagat (Shagto) etc. C. Conjunctive letters are pronounced twice when there is a b-fruit in or at the end of a word. Such as - Bishwa (Bisho) , Vidvan (Viddan) , Pakb (Pakko) etc. D. When m-fruit is added to the first consonant of a word , it is usually not pronounced. Such as - Smaran (Sharon) , Shmashan (Shanshan) , Smarak (Shanrok) etc.