'Embitterment' definitions:

Definition of 'embitterment'

(from WordNet)
noun
The state of being embittered; "the embitterment that resulted from the loss of his job never left him"

Definition of 'Embitterment'

From: GCIDE
  • Embitterment \Em*bit"ter*ment\, n. The act of embittering; also, that which embitters. [1913 Webster]