Meaning of (दूना करना) duna karna in english
As noun :
double Ex:  As the son of the late double Formula One world champion Graham Hill
Suggested : twice as large, heavy, strong, etc twofold in size, amount, number, extent, etc
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(दूना करना) duna karna
can be used as noun.. No of characters: 9 including consonants matras.
Transliteration :
duunaa karanaa