Lewis Short
(verb) : aestŭo, āvi, ātum, 1, aestus
* To be in agilation or in violent commotion, to move to and fro, to rage, to toss, to boil up.
* Lit.
* Of fire, to rage, burn: aestuat ut clausis rapidus fornacibus ignis,as the fire heaves and roars in the closed furnaces,Verg. G. 4, 263: tectus magis aestuat ignis,Ov. M. 4, 64.—Hence
* Trop.
* Of the undulating, heaving motion of the sea, to rise in waves or billows (cf. aestus): Maura unda,Hor. C. 2, 6, 4: gurges,Verg. A. 6, 296.
* Of other things, to have an undulating, waving motion, to be tossed, to heave: in ossibus umor,Verg. G. 4, 308: ventis pulsa aestuat arbor,Lucr. 5, 1097; Gell. 17, 11, 5. —Of an agitated crowd, Prud. 11, 228.
* Of the passions, love, desire, envy, jealousy, etc., to burn with desire, to be in violent, passionate excitement, to be agitated or excited, to be inflamed: quod ubi auditum est, aestuare (hist. inf.) illi, qui dederant pecuniam,Cic. Verr. 2, 2, 23: quae cum dies noctesque aestuans agitaret,Sall. J. 93: desiderio alicujus,Cic. Fam. 7, 18: invidiā,Sall. C. 23: ingens in corde pudor,Verg. A. 12, 666: at rex Odrysius in illa Aestuat,Ov. M. 6, 490 (cf. uri in id. ib. 7, 22; and ardere in id,ib. 9, 724); Mart. 9, 23: aestuat (Alexander) infelix angusto limite mundi (the figure is derived from the swelling and raging of the sea when confined),Juv. 10, 169; so Luc. 6, 63.
* Esp. in prose, to waver, to vacillate, to hesitate, to be uncertain or in doubt, to be undecided: dubitatione,Cic. Verr. 2, 2, 30: quod petiit, spernit; repetit quod nuper omisit; Aestuat et vitae disconvenit ordine toto,Hor. Ep. 1, 1, 99: sic anceps inter utramque animus aestuat,Quint. 10, 7, 33; Suet. Claud. 4: aestuante rege,Just. 1, 10.
Charlton T. Lewis, Charles Short, A Latin Dictionary