I.a., to boil up, foam up, ferment (not freq. till after the Aug. period; in Cic. and Caes. not at all).
I. Neut.
A. Lit.
1. In gen.: “exaestuat mare,” Liv. 26, 42 fin.; Curt. 6, 4: “fretum,” id. 4, 2: “unda ima verticibus,” Verg. G. 3, 240: “Aetna fundo imo,” id. A. 3, 577: “bitumen e terra,” Just. 1, 2, 7: “Nilus in fossas,” Suet. Aug, 18.—
2. In partic., to effervesce, to glow with heat: “Aegyptus torrenti calore solis exaestuat,” Just. 2, 1, 16.— Absol.: “ut exaestuarat,” had overheated himself, Suet. Tib. 72 med.—
B. Trop.: “mens exaestuat irā,” Verg. A. 9, 798; so, “irā,” Ov. M. 6, 623; 13, 559; Stat. Th. 11, 297: “dolor exaestuat intus,” Ov. Tr. 5, 1, 63; cf. “ignis (amoris),” id. M. 13, 867; poet.: “vates magno igni,” Luc. 5, 173.—
II. Act., to boil up with, to give forth, exhale (very rarely): “hos igitur tellus omnes exaestuat aestus,” Lucr. 6, 816; so, “aestus,” id. 2, 1137.