Having or showing great emotion or zeal; ardent: fervent protests; a fervent admirer.
Extremely hot; glowing.
[Middle English, from Old French, from Latin fervēns, fervent-, present participle of fervēre, to boil; see bhreu- in Indo-European roots.] fer'vent·ly adv., fer'vent·ness n.
1340, from L. fervens (gen. ferventis) "glowing," prp. of fervere "to boil, glow," from PIE base *bhreu- (see brew). The figurative sense of "impassioned" is first attested c.1400.