dys (means not functioning properly) + peptic.. pepsin..is an ENZYME...WHICH BREAKS DOWN THE FOOD PARTICLES AND HELPS IN DIGESTION,...SO if this enzyme stops functioning..then the problem of INDIGESTION occures.
Note that many of the words with roots from body organs mean irritable. Examples: splenetic, spleen, bilious, dyspeptic, livery, and liverish.
dyspeptic = dys + peptic; dys ( means not) + peptic ( pepsin enzyme to help indigestion.
dy( dye= color filling) peptic= pepsi, U drank that dye pepsi, as a result u are suffering from indigestion.