The document discusses the prefix "dis-", explaining that it means "not" and providing examples of words that use this prefix, such as "dislike" meaning "not like", "disobey" meaning "not obey", and "disagree" meaning "not agree". Some other dis- words explained are "disappear" meaning "to not appear", "dishonest" meaning "to not be honest", and "displeased" meaning "to not be pleased". In conclusion, it reminds the reader that "dis-" is a prefix meaning "not" and asks the reader to think of more dis- words.