The term digestion-related can be summarized by the crossword solution of 'PEPTIC, ' which is a six-letter word. PEPTIC is an adjective that describes something related to digestion, specifically the process of digestion in the stomach and intestines. It is derived from the Greek word 'pepsis, ' which means digestion. PEPTIC is often used to describe drugs or enzymes that help with digestion, such as antacids or digestive enzymes.