Exercise 4

The prefix dys is used frequently, and you will often have occasion to look in your medical dictionary for the meaning of a term beginning with dys. Approximately 300 such words are listed in your dictionary. Here's a chance for you to get familiar with three terms, in which the prefix dys is used.

Match the terms on the left with the definitions on the right.



  1. defective vision
  2. difficulty in controlling voluntary movement
  3. painful or difficult evacuation of feces