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Identify prefixes and suffixes in root words on this educational worksheet.

Worksheet for identifying prefixes and suffixes added to root words, featuring a list of words and blank lines for answers, with a cartoon character at the bottom.

Worksheet for identifying prefixes and suffixes added to root words, featuring a list of words and blank lines for answers, with a cartoon character at the bottom.

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Show Answer Key & Explanations Step-by-step solution for: Prefixes, Suffixes, and Root Words Worksheet for 4th Grade ...
Let's solve the problem step by step.

We are given a list of words, and we need to identify the prefix and suffix added to each root word. The goal is to break down each word into its prefix (beginning part), root (main part), and suffix (ending part).

Here’s the list of words:

1. uninformed
2. unfriendly
3. encouragement
4. disgraceful
5. unreasonable
6. reusable
7. lively
8. unhappy
9. irreducible
10. unfriendly *(duplicate)*

Let’s analyze each one:

---

1. uninformed


- Prefix: *un-* (means "not")
- Root: *inform* (to give information)
- Suffix: *-ed* (past tense or adjective form)

So:
- Prefix: un-
- Suffix: -ed

---

2. unfriendly


- Prefix: *un-* (means "not")
- Root: *friend* (a person you know well)
- Suffix: *-ly* (forms adverbs, but here it makes an adjective meaning "in a friendly way" — though “unfriendly” is an adjective formed from “friend” + “-ly” with negation)

Wait — actually, "unfriendly" = un- + friend + -ly
But note: "friend" → "friendly" is a common adjective formation using "-ly", though technically "friendly" comes from "friend" + "-ly" (adjective ending). But in this case, "unfriendly" is simply the negative of "friendly".

So:
- Prefix: un-
- Suffix: -ly

---

3. encouragement


- Prefix: *en-* (means "into" or "cause to be"; often used in verbs like "encourage")
- Root: *courage* (meaning bravery)
- Suffix: *-ment* (forms nouns, especially abstract nouns from verbs)

So:
- Prefix: en-
- Suffix: -ment

---

4. disgraceful


- Prefix: *dis-* (means "not" or "opposite of")
- Root: *grace* (beauty, elegance)
- Suffix: *-ful* (means "full of")

So:
- Prefix: dis-
- Suffix: -ful

---

5. unreasonable


- Prefix: *un-* (means "not")
- Root: *reason* (logic, thinking)
- Suffix: *-able* (means "capable of")

So:
- Prefix: un-
- Suffix: -able

---

6. reusable


- Prefix: *re-* (means "again")
- Root: *use*
- Suffix: *-able* (means "capable of")

So:
- Prefix: re-
- Suffix: -able

---

7. lively


- Prefix: none
- Root: *live* (to be alive)
- Suffix: *-ly* (adverbial form, but here it's used as an adjective meaning "full of life")

Note: “Lively” is derived from “live” + “-ly”, but it's not a true adverb; it's an adjective. Still, it follows the pattern.

So:
- Prefix: (none)
- Suffix: -ly

---

8. unhappy


- Prefix: *un-* (means "not")
- Root: *happy*
- Suffix: none

So:
- Prefix: un-
- Suffix: (none)

---

9. irreducible


- Prefix: *ir-* (variant of *un-*, means "not", used before words starting with 'r')
- Root: *reduce* (to make smaller)
- Suffix: *-ible* (means "capable of")

So:
- Prefix: ir-
- Suffix: -ible

---

10. unfriendly (again)


Same as #2:
- Prefix: un-
- Suffix: -ly

---

Final Answer Table:



| Prefix | Word | Suffix |
|--------|----------------|--------|
| un- | uninformed | -ed |
| un- | unfriendly | -ly |
| en- | encouragement | -ment |
| dis- | disgraceful | -ful |
| un- | unreasonable | -able |
| re- | reusable | -able |
| | lively | -ly |
| un- | unhappy | |
| ir- | irreducible | -ible |
| un- | unfriendly | -ly |

---

Summary:


We identified prefixes and suffixes by recognizing common affixes:
- Prefixes: *un-*, *dis-*, *en-*, *re-*, *ir-* (all mean "not" or "reverse" or "again")
- Suffixes: *-ed*, *-ly*, *-ment*, *-ful*, *-able*, *-ible*

This helps in understanding how words are built and their meanings!

Let me know if you'd like a printable version or explanation for any specific word!
Parent Tip: Review the logic above to help your child master the concept of prefix and suffixes worksheet.
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