mainly or primarily

predominately

प्राधान्यतः

English Usage: The community is preponderantly made up of young professionals.

Hindi Usage: समुदाय प्राधान्यतः युवा पेशेवरों से बना है।

overwhelmingly

मुख्य रूप से

English Usage: The results were preponderantly favorable for the new drug.

Hindi Usage: परिणाम मुख्य रूप से नई दवा के लिए अनुकूल थे।