1.Definition: (archaic) extremely hot, burning, or glowing

"The fervent heat...merely communicated a genial warmth to their half-torpid systems"

Related Adjective(s):fervid

2.Definition: characterized by intense emotion

"A fervent desire to change society", "A fervent admirer"

Related Adjective(s):ardent, fervid, fiery, impassioned, perfervid, torrid