grievousness Copy link Outline 1. ăcerbĭtas (bitterness; afflicting nature)2. (in connexion with words denoting something evil)3. expr. by adj. • grievousness: 1. ăcerbĭtas (bitterness; afflicting nature): g. of extreme sorrow, a. summi luctus. Cic. Fam. , 16, init. 2. (in connexion with words denoting something evil): magnĭtūdo: g. of danger, of hatred, m. periculi, odii: v. greatness. 3. expr. by adj.: O the g. of such a fate! O casum acerbum, luctuosum! v. grievous, sad.