ĭn-aestŭo — Lewis & Short
ĭn-aestŭo, āre, v. n.,
I to boil or rage in any thing (rare):
bilis,Hor. Epod. 11, 15:
succensi stomacho fellis inaestuans (impietas),Prud. adv. Symm. 1, praef. 58.