absorption acerbity acid acidity acidulousness acrimony anger animosity asperity assimilation autacoid bad humor bad temper biliousness bitter resentment bitterness bitterness of spirit causticity chalone choler corrosiveness digestion digestive secretion digestive system discontent endocrine gall gastric juice gastrointestinal tract gnashing of teeth hard feelings heartburning hormone ill humor ill nature ill temper ingestion intestinal juice liver mucus pancreas pancreatic digestion pancreatic juice predigestion prostatic fluid rancor rankling rheum saliva salivary digestion salivary glands salivary secretion secondary digestion semen slow burn soreness sourness sperm spleen tears thyroxin virulence