having or displaying a passionate intensity

उत्साही

English Usage: She was a fervent supporter of human rights.

Hindi Usage: वह मानवाधिकारों की उत्साही समर्थक थी।

intense and passionate feeling

तीव्रता

English Usage: His fervency for the cause inspired many.

Hindi Usage: उसके मामले के लिए उत्साह ने कई को प्रेरित किया।