bitterness

n.

  1. The quality or state of being bitter, sharp, or acrid, in either a literal or figurative sense; implacableness; resentfulness; severity; keenness of reproach or sarcasm; deep distress, grief, or vexation of mind.
  2. A state of extreme impiety or enmity to God.
  3. Dangerous error, or schism, tending to draw persons to apostasy.