Ill humor is a term used to describe a person's bad temper or irritability. The crossword solutions for this term are IRE (3 letters), SPLEEN (6 letters), VINEGAR (7 letters), BILE (4 letters), PET (3 letters), and CHOLER (6 letters). IRE is an emotion of anger, SPLEEN is an organ in the body associated with emotions, VINEGAR is a sour-tasting liquid, BILE is a bitter fluid produced by the liver, PET is a term used to describe someone who is fond of another, and CHOLER is an archaic term for anger.