What are the different prefixes that can change the meaning of words, and provide examples of each prefix being used?

There are numerous prefixes that can alter the meaning of words. Here are some commonly used prefixes, along with examples of how they can change the meaning of a word:

1. "Un-" is a prefix used to indicate the opposite or negation of the original word. For instance:
- Original word: "happy"
- Modified word: "unhappy" (meaning not happy)

2. "Dis-" is a prefix that implies the removal or negation of something. Example:
- Original word: "connect"
- Modified word: "disconnect" (meaning to separate or break the connection)

3. "Pre-" means before or earlier in time. Example:
- Original word: "war"
- Modified word: "prewar" (referring to a period of time before a war started)

4. "Mis-" is a prefix used to indicate a wrong action or misunderstanding. Example:
- Original word: "understand"
- Modified word: "misunderstand" (meaning to interpret incorrectly or not understand)

5. "Re-" signifies repetition, restoration, or returning to a previous state. Example:
- Original word: "do"
- Modified word: "redo" (meaning to do again or repeat)

6. "Over-" implies excess or going beyond a certain point. Example:
- Original word: "eat"
- Modified word: "overeat" (meaning to consume food excessively)

7. "Bi-" denotes two or twice the amount. Example:
- Original word: "cycle"
- Modified word: "bicycle" (meaning a two-wheeled vehicle)

8. "Mis-" can also indicate a wrong or mistaken action. Example:
- Original word: "take"
- Modified word: "mistake" (referring to an error or misunderstanding)

9. "Ex-" can signify out, beyond, or former. Example:
- Original word: "wife"
- Modified word: "ex-wife" (referring to a former spouse)

10. "In-" can denote "not" or "lack of." Example:
- Original word: "active"
- Modified word: "inactive" (meaning not active or dormant)

Remember, these are just a few examples of common prefixes and their meanings. There are many more prefixes that can modify the meaning of words.