effervo

ef-fervo, ĕre ( praes. effervent, Vitr. 2, 6, 5), v. n., to boil up or over ( poet. and in post-Aug. prose):

in agros Aetna,

Verg. G. 1, 471:

quatenus in pullos animales vortier ova Cernimus alituum vermesque effervere, qs. to come boiling forth,

i. e. to swarm forth, Lucr. 2, 928; cf. Verg. G. 4, 556; id. Dir. 15; Stat. Th. 4, 664.—Hence, effer-vens, entis, P. a., boiling with passion, i. e. fervent, ardent:

siquidem laetitia dicitur exsultatio quaedam animi gaudio efferventior eventu rerum expetitarum,

Gell. 2, 27, 3.