D defs.my
Entry 1 sense Webster, 1913

Exacerbate

/(ĕgz*ăs"ẽr*bāt; 277)/ · Ex·ac·er·bate · IPA /ɪɡˈzæsɚˌbeɪt/
01 v. t. To render more violent or bitter; to irritate; to exasperate; to imbitter, as passions or disease.
imp. & p. p. Exacerbated; p. pr. & vb. n. Exacerbating
  1. 1.
    To render more violent or bitter; to irritate; to exasperate; to imbitter, as passions or disease.