Prefix Practice Worksheet for learning word formation with prefixes.

Let’s go step by step to solve this prefix practice worksheet.

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Part One: Write which word is being described.

We are given definitions and need to write the correct word that matches each definition — specifically, words formed with prefixes like *pre-*, *re-*, *un-*, *dis-*, etc., but here we’re just matching meanings to common prefixed words.

1. To heat before → This means heating something ahead of time. The word is preheat.
2. To not like → “Not” = dis-, so dislike.
3. To do the opposite of tie → Opposite of tying is untying → untie.
4. To write again → “Again” = re-, so rewrite.
5. To pay before → Paying in advance → prepay.
6. To do the opposite of pack → Unpacking → unpack.
7. To use again → Reusing → reuse.

✔ Part One Answers:
1. preheat
2. dislike
3. untie
4. rewrite
5. prepay
6. unpack
7. reuse

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Part Two: Add a prefix (pre, re, un, dis) to the base word to create a new word.

We’ll pick the best-fitting prefix from the list: *pre-, re-, un-, dis-*

8. ___ play → You can “replay” a game or video → replay
9. ___ honest → Not honest = dishonest → dishonest
10. ___ do → Do again = redo → redo
11. ___ known → Not known = unknown → unknown
12. ___ heat → Heat before = preheat → preheat
13. ___ pay → Pay again? Or pay before? Both possible, but “repay” is more common for paying back → repay
*(Note: “prepay” also works, but since #5 was prepay, maybe they want variety. But let’s stick with most logical. Actually, looking at context, “repay” fits better as “pay again/back”.)*
Wait — actually, both could work, but let’s check standard usage. In school worksheets, “repay” is often used for “pay back”, while “prepay” is “pay before”. Since no context, either might be accepted — but let’s go with repay for #13 because it’s very common.
However, looking back at Part One, #5 was “to pay before” = prepay, so here if they say “___ pay”, without context, “repay” is safer as a general term. Let’s confirm later.

Actually, let’s think:
#13: ___ pay → Could be “prepay” or “repay”. But since “prepay” was already used in Part One, and this is Part Two creating new words, perhaps they expect “repay”. But wait — the instruction says “add a prefix... to create a new word” — doesn’t say avoid repeats. So technically both are valid. But let’s see what makes sense.

Looking at other items:

14. ___ fund → Fund again? Refund! Yes → refund
15. ___ read → Read again → reread
16. ___ true → Not true → untrue? Or false? But “untrue” is a word → untrue
*(Also “distrue” isn’t a word, so only “untrue” works)*
17. ___ use → Use again → reuse
18. ___ obey → Not obey → disobey → disobey
19. ___ school → Before school? Preschool → preschool
20. ___ change → Change again? Rechange? Not common. Undo change? Unchange? Not really. Dischange? No. Hmm.
Wait — “unchange” isn’t standard. “Rechange” is rare. Maybe “discharge”? But that’s different meaning.
Actually, “change” with prefix:
- recharge? That’s for batteries.
- But “rechange” isn’t commonly used.
Perhaps they mean “undo change” → but “unchange” isn’t a real word.
Wait — maybe “mischange”? Not in our prefix list.
Our options are only: pre, re, un, dis.
Let’s think:
- “Dischange” — not a word.
- “Unchange” — not standard; we say “unchanged” as adjective, but not verb.
- “Prechange” — no.
- “Rechange” — sometimes used informally, but not ideal.
Hmm… maybe I made a mistake. Let me double-check.

Wait — perhaps #20 is meant to be “recharge” but the base word is “change”, not “charge”. Oh! Look: #20 says “___ change” — but maybe it’s a typo? Or perhaps it’s “discharge”? But “discharge” comes from “charge”, not “change”.

Hold on — let’s look again at the original problem text you provided:

> 20. ___ change

But in many such worksheets, #20 is often “recharge” — but here it says “change”. Unless it’s a misread? But according to your input, it’s “change”.

Alternatively, perhaps “unchange” is accepted in some curricula? Unlikely.

Wait — another idea: “prechange” — no.

Perhaps it’s “dischange” — still not a word.

This is tricky. Let me think differently.

Maybe it’s “rechange” — even though uncommon, it might be accepted as “to change again”. For example, “I had to rechange my clothes.” It’s not standard English, but in elementary worksheets, sometimes they accept it.

But let’s check online or standard answers for similar worksheets.

Actually, upon second thought — perhaps it’s “unchange” as in “make unchanged”, but that’s not how prefixes work usually.

Wait — maybe I misread the base word. Let me re-express all:

From your text:

> 20. ___ change

But in many versions of this exact worksheet (which is common), #20 is “___ charge” → recharge.

Given that, and since “change” doesn’t fit well with any of the four prefixes to make a common word, I suspect there might be a typo in the problem transcription — but since I must work with what’s given, let’s consider:

Is there ANY valid word?

- “Dischange” — no
- “Unchange” — not a verb; “unchanged” is adjective
- “Prechange” — no
- “Rechange” — occasionally used, e.g., “rechange the battery” — but usually “replace” or “recharge”

Actually, “rechange” is listed in some dictionaries as a rare verb meaning “to change again”.

For educational purposes at this level, they might accept rechange.

But let’s see #21 first.

21. ___ agree → Not agree → disagree → disagree

So back to #20: ___ change

If forced to choose from pre/re/un/dis, the least bad option is rechange, assuming they mean “change again”.

Alternatively, perhaps it’s “unchange” as in “reverse the change”, but that’s stretching.

Wait — another possibility: “discharge” — but base word is “change”, not “charge”.

Unless... did you mean “charge” for #20? Because in the image description you wrote “change”, but maybe it’s “charge”?

Looking back at your initial message:

You wrote:

> 20. ___ change

But in the actual image (which I can't see, but based on common worksheets), it's likely “___ charge”.

However, since you explicitly typed “change”, I have to go with that.

Let me search my knowledge: Is there a word “prechange”? No. “Unchange”? Not really. “Dischange”? No. “Rechange”? Rare, but exists.

In fact, Merriam-Webster lists “rechange” as a verb: “to change again”.

So for the sake of completing the worksheet, I'll go with rechange for #20.

But let’s verify all others first.

List again:

8. replay ✔
9. dishonest ✔
10. redo ✔
11. unknown ✔
12. preheat ✔
13. repay — or prepay? Let’s decide.

For #13: ___ pay

Common words:
- prepaid (adjective)
- prepay (verb)
- repay (verb) — to pay back

Since Part One had “to pay before” = prepay, and this is Part Two creating new words, and “repay” is very common, I think repay is intended here.

Similarly, #14: ___ fund → refund ✔
#15: ___ read → reread ✔
#16: ___ true → untrue ✔ (since “distrue” isn’t a word)
#17: ___ use → reuse ✔
#18: ___ obey → disobey ✔
#19: ___ school → preschool ✔
#20: ___ change → rechange (reluctantly)
#21: ___ agree → disagree ✔

Now, for #20, if we allow “rechange”, it’s acceptable.

But let’s think: is there a better fit? What about “unchange”? If we interpret it as “to make not changed”, but that’s not standard. Verb form would be “unchange” — not found in major dictionaries.

Whereas “rechange” is at least attested.

Perhaps the worksheet has a typo, but I must answer as given.

Another idea: “dischange” — no.

I recall that in some contexts, “change” with “un-” gives “unchangeable”, but that’s an adjective.

For verb, no.

So I’ll go with rechange for #20.

But let’s cross-validate with standard answers for this exact worksheet.

Upon recalling, this is a very common worksheet, and typically:

- #20 is “___ charge” → recharge

Given that, and since you might have mistyped “change” instead of “charge”, but you said “change”, I should note that.

However, to proceed, I’ll assume it’s “change” and use “rechange”.

But wait — let’s look at the numbering: you have up to 21, and #20 is “___ change”, #21 “___ agree”.

Perhaps in the original, it’s “charge”.

To be safe, I’ll provide two possibilities, but the format requires one final answer.

Since the user expects a solution, and “rechange” is the only plausible among the four prefixes for “change”, I’ll use that.

Final decision for #20: rechange

But let’s list all answers clearly.

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Final Answer:

Part One:
1. preheat
2. dislike
3. untie
4. rewrite
5. prepay
6. unpack
7. reuse

Part Two:
8. replay
9. dishonest
10. redo
11. unknown
12. preheat
13. repay
14. refund
15. reread
16. untrue
17. reuse
18. disobey
19. preschool
20. rechange
21. disagree

Note: For #20, if the base word was meant to be "charge", then "recharge" would be correct. But as written ("change"), "rechange" is the best available option with the given prefixes.