Lewis & Short

tŭmesco, mŭi, 3, v. inch. n. [tumeo], to begin to swell, to swell up (poet. and in postAug. prose).

  1. I. Lit.: inflatum mare cum subito penitusque tumescit, Cic. poët. Div. 1, 7, 13: vi maria, Verg. G. 2, 479: freta ventis, Ov. M. 1, 36: inflata colla, id. ib. 6, 377: vulnera, Tac. H. 2, 77: fluvius tabe nivis, Luc. 10, 244: suco herba, Sen. Herc. Fur. 936: matura virginitas, Claud. Epith. 125.
  2. II. Trop., to swell up, become swollen with passionate excitement, to become excited, violent, ready to burst forth: rumpor et ora mihi pariter cum mente tumescunt (with anger), Ov. H. 8, 57: rabie, Claud. IV. Cons. Hon. 242.
    1. B. To be puffed up with pride or insolence: mens aut languescit aut contra tumescit inani persuasione, Quint. 1, 2, 18; so with pride: serviles animi alte, Claud. in Eutr. 1, 176: Ly dia Pactoli fonte, id. II. Cons. Stil. 61: (monet) operta tumescere bella, are fermenting, threatening to break out, Verg. G. 1, 465; cf.: tumescens bellum, Vell. 2, 15, 2.