19 Free Printable Prefix Worksheets 4th Grade - Free PDF at ... - Free Printable

Let's solve this worksheet step by step. The goal is to identify the prefix, suffix, and root word for each given word.

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🔹 Definitions:

- Prefix: A word part added before a root word that changes its meaning.
- Suffix: A word part added after a root word that changes its meaning or grammatical function.
- Root Word: The base or core of a word, which carries the main meaning.

Not all words will have a prefix or suffix.

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Now let’s analyze each word:

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1. tallest
- Prefix: None
- Suffix: -est (comparative/superlative)
- Root Word: tall

2. younger
- Prefix: None
- Suffix: -er (comparative)
- Root Word: young

3. become
- Prefix: be- (a common prefix indicating "to become" or "to do")
- Suffix: None
- Root Word: come

4. unhappy
- Prefix: un- (means "not")
- Suffix: None
- Root Word: happy

5. preschool
- Prefix: pre- (means "before")
- Suffix: None
- Root Word: school

6. disappear
- Prefix: dis- (means "not" or "away from")
- Suffix: None
- Root Word: appear

7. underground
- Prefix: under- (means "beneath")
- Suffix: None
- Root Word: ground

8. misspoke
- Prefix: mis- (means "wrongly")
- Suffix: -ed (past tense)
- Root Word: speak

9. ungrateful
- Prefix: un- (means "not")
- Suffix: -ful (means "full of")
- Root Word: grateful → but actually, the root is grate, so:
Wait — let’s break it down:
- "un-" = prefix
- "grateful" = root + suffix? Actually, "grateful" itself has a suffix (-ful).
- So: un- (prefix), -ful (suffix), grate (root)

But "grateful" comes from "grate" + "-ful", so:
- Root: grate
- Prefix: un-
- Suffix: -ful

10. replay
- Prefix: re- (means "again")
- Suffix: None
- Root Word: play

11. worthless
- Prefix: None
- Suffix: -less (means "without")
- Root Word: worth

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✔ Final Answer Table:

| Word | PREFIXES | SUFFIX | ROOT WORD |
|------------|----------|---------|-----------|
| tallest | | -est | tall |
| younger | | -er | young |
| become | be- | | come |
| unhappy | un- | | happy |
| preschool | pre- | | school |
| disappear | dis- | | appear |
| underground| under- | | ground |
| misspoke | mis- | -ed | speak |
| ungrateful | un- | -ful | grate |
| replay | re- | | play |
| worthless | | -less | worth |

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💡 Explanation:

- Some words like tallest and younger are formed by adding suffixes to base adjectives.
- Words like become, unhappy, and disappear use prefixes to change meaning.
- Misspoke has both a prefix (mis-) and a suffix (-ed) for past tense.
- Ungrateful has two parts: un- (negation) and -ful (meaning "full of"), with grate as the root.
- Worthless uses -less to mean "without worth."

This exercise helps students understand how words are built using prefixes, roots, and suffixes — a key skill in vocabulary development!

Let me know if you'd like a printable version!