Prefixes, Suffixes and Root Words worksheet - Free Printable

Problem Analysis:

The task involves two parts:
1. Identifying the root words in a list of given words.
2. Adding prefixes to change the meaning of certain words as specified.

Let's solve each part step by step.

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Part 1: Identifying the Root Words

#### Instructions:
Find the root word in each of the following words.

#### Words:
1. unhappiness
2. replacement
3. premature
4. automobiles
5. bicycles
6. dissatisfied
7. forecasting
8. triangular
9. telephones
10. discouragement

#### Solution:
To identify the root word, we need to remove any prefixes or suffixes that modify the core meaning of the word.

1. unhappiness:
- Prefix: "un-" (negation)
- Suffix: "-ness" (noun form)
- Root word: happy

2. replacement:
- Prefix: "re-" (again)
- Suffix: "-ment" (noun form)
- Root word: place

3. premature:
- Prefix: "pre-" (before)
- Suffix: "-ure" (state or condition)
- Root word: mature

4. automobiles:
- Prefix: "auto-" (self)
- Suffix: "-mobile" (movement)
- Root word: mobile

5. bicycles:
- Prefix: "bi-" (two)
- Suffix: "-cle" (wheel)
- Root word: cycle

6. dissatisfied:
- Prefix: "dis-" (not)
- Suffix: "-ed" (past participle)
- Root word: satisfied

7. forecasting:
- Prefix: "fore-" (before)
- Suffix: "-ing" (present participle)
- Root word: cast

8. triangular:
- Prefix: "tri-" (three)
- Suffix: "-angular" (angle-related)
- Root word: angle

9. telephones:
- Prefix: "tele-" (far)
- Suffix: "-phone" (sound)
- Root word: phone

10. discouragement:
- Prefix: "dis-" (not)
- Suffix: "-ment" (noun form)
- Root word: courage

#### Final Answer for Part 1:
1. happy
2. place
3. mature
4. mobile
5. cycle
6. satisfied
7. cast
8. angle
9. phone
10. courage

---

Part 2: Adding Prefixes to Change Meaning

#### Instructions:
Add a prefix to change each word's meaning to the meaning in brackets.

#### Words and Meanings:
1. happy (not happy)
2. mature (before mature)
3. vision (from a distance vision)
4. legal (not legal)
5. cycle (one wheel cycle)
6. million (many million)
7. apply (again apply)
8. perfect (not perfect)
9. angle (three angle)
10. regular (not regular)

#### Solution:
We need to add appropriate prefixes to alter the meaning of each word as specified.

1. happy (not happy):
- Prefix: "un-"
- New word: unhappy

2. mature (before mature):
- Prefix: "pre-"
- New word: premature

3. vision (from a distance vision):
- Prefix: "tele-"
- New word: television

4. legal (not legal):
- Prefix: "il-"
- New word: illegal

5. cycle (one wheel cycle):
- Prefix: "mono-"
- New word: monocycle

6. million (many million):
- Prefix: "multi-"
- New word: multimillion

7. apply (again apply):
- Prefix: "re-"
- New word: reapply

8. perfect (not perfect):
- Prefix: "im-"
- New word: imperfect

9. angle (three angle):
- Prefix: "tri-"
- New word: triangle

10. regular (not regular):
- Prefix: "ir-"
- New word: irregular

#### Final Answer for Part 2:
1. unhappy
2. premature
3. television
4. illegal
5. monocycle
6. multimillion
7. reapply
8. imperfect
9. triangle
10. irregular

---

Final Answer:

Part 1:
1. happy
2. place
3. mature
4. mobile
5. cycle
6. satisfied
7. cast
8. angle
9. phone
10. courage

Part 2:
1. unhappy
2. premature
3. television
4. illegal
5. monocycle
6. multimillion
7. reapply
8. imperfect
9. triangle
10. irregular

Boxed Final Answer:
$$
\boxed{
\text{Part 1: happy, place, mature, mobile, cycle, satisfied, cast, angle, phone, courage} \\
\text{Part 2: unhappy, premature, television, illegal, monocycle, multimillion, reapply, imperfect, triangle, irregular}
}
$$