16 Prefix Un Re Worksheet - Free PDF at worksheeto.com - Free Printable

Let's solve this "Make a Word" worksheet step by step. The goal is to choose the correct prefix (*dis*, *re*, or *un*) that, when added to the base word, forms a real and meaningful English word.

We are given three prefixes:
- dis – often means "not" or "opposite of"
- re – means "again" or "back"
- un – means "not"

Now, let’s go through each base word and determine which prefix makes a valid word.

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1. fill → refill ✔ (already given)
- *re* + fill = refill (to fill again)

2. real
- dis + real = disreal ✘ (not a word)
- re + real = rereal ✘ (not a word)
- un + real = unreal ✔ (means not real)
→ unreal

3. fair
- dis + fair = disfair ✘
- re + fair = refair ✘
- un + fair = unfair ✔ (not fair)
→ unfair

4. able
- dis + able = disable ✔ (to make unable)
- re + able = reable ✘
- un + able = unable ✔ (also valid!)
But wait — both disable and unable are valid. However, we must pick one based on common usage and context.

But note: the pattern in the list is likely to use common combinations.

Let’s check:
- disable = to make someone unable
- unable = not able

Both are valid, but since the base word is “able”, and we’re choosing one prefix, unable is more direct and commonly used.

However, disable is also a real word. But let’s look at the structure.

Actually, disable uses the prefix *dis-* with *able* → disable ✔
And unable uses *un-* with *able* → unable ✔

So which one fits best?

In this case, disable is the more standard compound word formed from *dis-* + *able*.
But unable is also correct.

Wait — actually, unable is more commonly used than *disable* in basic vocabulary.

But let's consider: the prefix *dis-* is often used with verbs like *connect*, *trust*, etc., while *un-* is used with adjectives.

Since able is an adjective, unable is more natural.

So: unable

✔ unable

5. connect
- dis + connect = disconnect ✔ (to stop connecting)
- re + connect = reconnect ✔ (to connect again)
- un + connect = unconnect ✘ (not a word)

So both *dis-* and *re-* work, but reconnect is more common in modern usage.

However, disconnect is also very common.

But let's see: the base word is "connect", and both reconnect and disconnect are valid.

Which one is more likely expected?

Looking at the pattern:
- "refill" uses *re-*
- "unfair" uses *un-*
- "unable" uses *un-*
- "disconnect" uses *dis-* → common word

But reconnect is also valid.

However, disconnect is a standard word, and *dis-* is a common prefix for verbs.

So: disconnect ✔

6. trust
- dis + trust = distrust ✔ (lack of trust)
- re + trust = retrust ✘ (not a word)
- un + trust = untrust ✘ (not a word)

→ distrust

7. run
- dis + run = disrun ✘
- re + run = rerun ✔ (to run again, e.g., a movie)
- un + run = unrun ✘

→ rerun

8. move
- dis + move = dismove ✘
- re + move = remove ✔ (to take away)
- un + move = unmove ✘

→ remove

9. selfish
- dis + selfish = disselfish ✘
- re + selfish = reselfish ✘
- un + selfish = unselfish ✔ (not selfish, generous)

→ unselfish

10. tell
- dis + tell = distell ✘
- re + tell = retell ✔ (to tell again)
- un + tell = untell ✘

→ retell

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Final Answers:

| Base Word | Prefix | New Word |
|----------|--------|---------|
| fill | re | refill |
| real | un | unreal |
| fair | un | unfair |
| able | un | unable |
| connect | dis | disconnect |
| trust | dis | distrust |
| run | re | rerun |
| move | re | remove |
| selfish | un | unselfish |
| tell | re | retell |

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✔ Correct Answers to Fill In:

1. unreal
2. unfair
3. unable
4. disconnect
5. distrust
6. rerun
7. remove
8. unselfish
9. retell

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Explanation Summary:

- Prefixes change meaning:
- *un-* usually means "not" (e.g., unfair, unable)
- *re-* means "again" (e.g., refill, rerun, retell)
- *dis-* often means "not" or "opposite" (e.g., distrust, disconnect)

- We chose the prefix that forms a real, common English word with the base word.

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