The term PRO-OR-CON is composed of two parts: a 4-letter word, SIDE, and a 6-letter word, PREFIX. The word SIDE refers to a position taken on an issue or argument, either in favor of it (PRO) or against it (CON). The word PREFIX is an affix that is placed before the stem of a word, often to modify its meaning. In this case, the PREFIX 'PRO' or 'CON' is added to the beginning of a word to indicate a position taken on an issue. Together, the two words form the term PRO-OR-CON, which is used to describe a situation in which two opposing sides are present.