This worksheet helps students practice forming new words by adding the prefixes un- and dis- to common base words.

Let's solve this worksheet step by step.

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A. Add the correct prefix (un- or dis-) to the front of each base word to make a new word.

We are given two prefixes: un- and dis-, both meaning "not" or "opposite of." We need to choose the correct one for each word.

1. zip → unzip
✔ *Unzip* means to open a zipper. "Un-" is used here because it’s a common action verb with "un-" as the opposite of zipping.

2. comfort → uncomfortable
✘ Wait — the base word is “comfort.” But we need to form a word using un- or dis-.
The correct word is uncomfortable, but that requires adding "-able" too. However, since the instruction says “add the correct prefix,” let’s consider if there's a direct match.
Actually, the intended answer is likely uncomfortable, but since only a prefix is being added, perhaps they expect discomfort?
But discomfort uses "dis-", and it's not a simple prefix addition to "comfort."

Let's reconsider:
- uncomfortable = un + comfort + able → but that’s not just adding a prefix.
- discomfort = dis + comfort → yes! This is valid.

So: discomfort

✔ discomfort

3. friendly → unfriendly
✔ "Un-" makes sense here: not friendly → unfriendly

4. agree → disagree
✔ "Dis-" is used for opposition: disagree = not agree

5. ripe → unripe
✔ "Un-" means not ripe → unripe

6. pleasant → unpleasant
✔ "Un-" means not pleasant → unpleasant

7. order → disorder
✔ "Dis-" means lack of order → disorder

8. respect → disrespect
✔ "Dis-" means lack of respect → disrespect

9. fair → unfair
✔ "Un-" means not fair → unfair

10. trust → distrust
✔ "Dis-" means lack of trust → distrust

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✔ Section A Answers:

1. zip → unzip
2. comfort → discomfort
3. friendly → unfriendly
4. agree → disagree
5. ripe → unripe
6. pleasant → unpleasant
7. order → disorder
8. respect → disrespect
9. fair → unfair
10. trust → distrust

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B. Use the words you made above to complete each sentence

Now use the words from part A in context.

11. His case of chickenpox caused Kenoah great _____________.
→ Think: What would be a result of illness? Likely discomfort
✔ discomfort

12. Remaine could not _____________ his jacket.
→ He couldn't open the jacket → unzip
✔ unzip

13. That _____________ dog barks and snaps at everyone.
→ A dog that is not friendly → unfriendly
✔ unfriendly

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✔ Final Answers:

#### A.
1. unzip
2. discomfort
3. unfriendly
4. disagree
5. unripe
6. unpleasant
7. disorder
8. disrespect
9. unfair
10. distrust

#### B.
11. discomfort
12. unzip
13. unfriendly

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📝 Explanation:

- Prefixes "un-" and "dis-" both mean "not" or "opposite of."
- "un-" is commonly used with adjectives and verbs (e.g., unhappy, unripe, unzip).
- "dis-" is often used with verbs and nouns to indicate negation or reversal (e.g., disagree, distrust, disorder).
- Some words like "uncomfortable" require more than just a prefix, but in this case, the intended answers are based on standard prefix usage.

This exercise helps students understand how prefixes change word meanings and improve vocabulary.