Join Prefix and Root Words | Turtle Diary Worksheet - Free Printable

Let's solve this step by step.

We are given a list of prefixes and root words, and we need to match each prefix with the correct root word to form a meaningful new word. Then, write the combined word in the box below.

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Step 1: Understand the prefixes and their meanings

- un-: means "not" or "opposite of"
- re-: means "again" or "back"
- pre-: means "before"
- mis-: means "wrongly" or "badly"
- dis-: means "not" or "opposite of"
- im-: means "not" (used before words starting with 'p', 'm', 'b')
- in-: means "not" (used before words starting with 'l', 'r', 's', etc.)

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Step 2: Look at the root words

Root words:
- known
- heat
- do
- pronounce
- perfect
- grown
- honest

Now let’s match each prefix to the most logical root word:

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1. un + ______

"un-" + "known" → unknown ✔
(“not known”)

So: un + known = unknown

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2. re + ______

"re-" + "heat" → reheat ✔
(to heat again)

So: re + heat = reheat

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3. pre + ______

"pre-" + "do" → predo? ✘ (Not a real word)
"pre-" + "grown" → pregrown? (Rare, but possible)
"pre-" + "perfect" → preperfect? ✘
"pre-" + "pronounce" → prepronounce? ✘
Wait — better option: "pre-" + "do" → not common
But “pre-” + “do” → no standard word.

Wait — maybe pre- + do is not right.

Wait! Let’s think: pre- + do → pre-do? Not common.

But pre- + do → pre-do? No.

Actually, there’s a word: preheat? But “heat” is already matched.

Wait — perhaps pre- goes with do? That doesn’t make sense.

Wait — maybe pre- + do → pre-do? No.

Hold on — let’s try another approach.

What about pre- + do? Not valid.

But pre- + perfect → imperfect? No — that’s “im-”

Wait — maybe pre- + do → pre-do? Not a word.

Wait — actually, pre- + do → pre-do? No.

Wait — pre- + do → pre-do? Not used.

Wait — perhaps pre- + do → pre-determine? But "determine" isn't here.

Wait — maybe pre- + do → pre-do? Not a real word.

Wait — perhaps I made a mistake.

Let’s look at do — what prefix can go with it?

"re- + do" → redo ✔
Yes! "redo" is a real word.

But “re-” is already used for “reheat”.

Wait — so maybe “re-” goes with “do”? But “reheat” is also valid.

But only one match per prefix and root.

So we must find best matches.

Let’s go through all possibilities.

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Try matching logically:

1. un- → known → unknown ✔
2. re- → do → redo ✔
OR re- → heat → reheat ✔
So which one?

Let’s see:

- redo – yes, common word
- reheat – yes, also common

But both are valid.

But we have only one "re-" and one "do", one "heat".

So we need to assign correctly.

Wait — let’s check if pre- can go with something.

pre- + do → pre-do? No
pre- + heat → preheat ✔
Ah! Yes — preheat is a real word.

So pre- + heat → preheat

That’s good.

Then re- + do → redo

And re- + heat → reheat

But we can’t use both.

So now we have:

- pre- → heat → preheat
- re- → do → redo

But wait — re- + do = redo ✔
re- + heat = reheat ✔

But we can’t use both.

But pre- + heat = preheat ✔

So if pre- takes heat, then re- cannot take heat.

So re- must go with do → redo

Then heat is taken by pre-

So far:

1. un- + known → unknown
2. re- + do → redo
3. pre- + heat → preheat
4. mis- + ?
5. dis- + ?
6. im- + ?
7. in- + ?

Now remaining roots:
- pronounce
- perfect
- grown
- honest

Remaining prefixes:
- mis-
- dis-
- im-
- in-

Now:

4. mis- → pronounce → mispronounce ✔
(mis + pronounce = mispronounce)

5. dis- → perfect → imperfect? Wait — “im-” is used for “perfect”

Wait — “dis-” + “perfect” → disperfect? ✘ (No such word)

“dis-” + “honest” → dishonest ✔
Yes! dishonest

So dis- + honest → dishonest

6. im- → perfect → imperfect ✔
(im- + perfect = imperfect)

7. in- → grown → ingrown ✔
(in- + grown = ingrown)

Now check all:

- un- + known → unknown
- re- + do → redo
- pre- + heat → preheat
- mis- + pronounce → mispronounce
- dis- + honest → dishonest
- im- + perfect → imperfect
- in- + grown → ingrown

All words are valid!

Now verify the roots:

Roots given:
- known
- heat
- do
- pronounce
- perfect
- grown
- honest

All used once.

Prefixes:
- un-, re-, pre-, mis-, dis-, im-, in- — all used once.

Perfect.

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Final Matching:

1. un - known → unknown
2. re - do → redo
3. pre - heat → preheat
4. mis - pronounce → mispronounce
5. dis - honest → dishonest
6. im - perfect → imperfect
7. in - grown → ingrown

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Write answers in the boxes:

```
1. unknown
2. redo
3. preheat
4. mispronounce
5. dishonest
6. imperfect
7. ingrown
```

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✔ All words are correct and commonly used.

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Final Answer:

Boxed Answers:

1. unknown
2. redo
3. preheat
4. mispronounce
5. dishonest
6. imperfect
7. ingrown

Let me know if you'd like this formatted as a printable answer sheet!