Meaning of (आवाज़ बढ़ाना) avaj badhana in english
As verb :
amplify Ex:  The double bass is difficult to amplify in loud concert venue settings
Suggested : to make larger, greater, or stronger enlarge extend
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(आवाज़ बढ़ाना) avaj badhana
can be used as verb.. No of characters: 12 including vowels consonants matras.
Transliteration :
aavaaja ba.Dhaanaa