Lewis & Short

exăcerbātĭo, ōnis, f. [exacerbo],

  1. I. an exasperation, Rufin. de Schem. 11, p. 274: peccatorum, i. e. because of, Salv. Gub. Dei, 4, 7.
  2. II. Esp., of the stirring of divine anger by the Jews in the wilderness, the provocation, Vulg. Hebr. 3, 8; 15.