Educational worksheet on root words, prefixes, and suffixes for language learning.

Let's solve the problem step by step.

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Part 1: Find the root word in each of the following words.

We need to identify the root word — the base word from which the given word is formed, often with prefixes or suffixes added.

1. unhappiness
- Prefix: *un-* (means "not")
- Suffix: *-ness* (means "state of being")
- Root word: happy

2. replacement
- Prefix: *re-* (means "again")
- Suffix: *-ment* (forms nouns)
- Root word: place

3. premature
- Prefix: *pre-* (means "before")
- Root word: mature

4. automobiles
- Prefix: *auto-* (means "self")
- Root word: mobile (from Latin *movere*, meaning "to move")

5. bicycles
- Prefix: *bi-* (means "two")
- Root word: cycle

6. dissatisfied
- Prefix: *dis-* (means "not")
- Suffix: *-ed* (past tense)
- Root word: satisfy

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

8. triangular
- Prefix: *tri-* (means "three")
- Suffix: *-al* (adjective-forming)
- Root word: angle

9. telephones
- Prefix: *tele-* (means "far away")
- Suffix: *-s* (plural)
- Root word: phone

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

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✔ Part 1 Answers:

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

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Part 2: Add a prefix to change each word’s meaning to the meaning in brackets.

We need to add a prefix to create a new word that matches the meaning in parentheses.

1. happy → not happy
- Use prefix: un-
- Answer: unhappy

2. mature → before mature
- Use prefix: pre-
- Answer: premature

3. vision → from a distance vision
- Use prefix: tele- (meaning "far")
- Answer: television

4. legal → not legal
- Use prefix: il- (for "not" with words starting with 'l')
- Answer: illegal

5. cycle → one wheel cycle
- Use prefix: mono- (means "one")
- Answer: monocycle

6. million → many million
- Use prefix: multi- (means "many")
- Answer: multimillion

7. apply → again apply
- Use prefix: re- (means "again")
- Answer: reapply

8. perfect → not perfect
- Use prefix: im- (commonly used for negation with "perfect")
- Answer: imperfect

9. angle → three angle
- Use prefix: tri- (means "three")
- Answer: triangle

10. regular → not regular
- Use prefix: ir- (used for negation with "regular")
- Answer: irregular

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✔ Part 2 Answers:

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

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🟩 Final Answer Summary:

#### Root Words:
1. happy
2. place
3. mature
4. mobile
5. cycle
6. satisfy
7. cast
8. angle
9. phone
10. courage

#### Words with Added Prefixes:
1. unhappy
2. premature
3. television
4. illegal
5. monocycle
6. multimillion
7. reapply
8. imperfect
9. triangle
10. irregular

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