Unrehearsed Meaning in Bengali

What is the meaning of word Unrehearsed in Bengali/Bangla ?

Meaning of Unrehearsed in Bangla is : অপরিবর্তিত (O . p o . r i . b o r . t i . t o)

Defenition of word Unrehearsed

Example

spontaneous and unrehearsed music

Other Meaning of Unrehearsed