Use 'fervent' to emphasize the intensity of someone's feelings, stronger than just being supportive or interested. Her fervent appeal for aid showed her deep commitment to the cause.
Pro Tip 2/3
Positive Persuasion
'Fervent' often carries a positive tone, suggesting admiration for someone's strong belief or enthusiasm. His fervent speech inspired many to join the campaign.
Pro Tip 3/3
Emotional Appeal
When describing a person as 'fervent', it suggests they may inspire others with their passion. The crowd was moved by the musician's fervent performance.