Given the current state of human civilization, this worksheet on the Greek root dys ought to be useful. It means bad, difficult, abnormal, and impaired. This is another of those roots that shows up all over the English language. For instance, if you work in a public school, there is, I will hazard a guess, a very good chance that the adjective dysfunctional has crossed your lips on more than one occasion.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.