English Learning for Beginners: Prefixes & Suffixes

Dialogue

Alice: Hey Bob, check out my new coffee cup!

Bob: Wow, Alice! It looks… regular. What’s so special about it?

Alice: It’s re-usable! No more disposable plastic for me.

Bob: Re-usable? Does that mean you can use it again… and again… and again?

Alice: Exactly! And it’s super eco-friendly. I’m trying to be a responsible citizen.

Bob: Eco-friendly… so it’s a friend to the environment? That sounds like a superhero name: Captain Eco-Friendly!

Alice: Pretty much! And the best part is, it’s un-breakable. Almost!

Bob: Un-breakable? Really? So I can drop it from a tall building and it will be fine?

Alice: Haha, let’s not test that, Bob! But it’s very durable. And it’s completely wash-able, obviously.

Bob: Wash-able, so, able to be washed. I’m starting to understand this word-magic!

Alice: See? You’re getting good at this! Knowing prefixes and suffixes makes words understand-able.

Bob: So, disposable means not able to be used again, like, you throw it away? My brain is doing gymnastics.

Alice: Close! ‘Dis-‘ means ‘not’ or ‘opposite’. So disposable means able to be disposed of (thrown away). It’s the opposite of re-usable!

Bob: Aha! Like un-happy means not happy. My mind is un-locked! This is actually quite help-ful.

Alice: You got it! You’re learning fast, friend-ly Bob!

Current Situation

Imagine words as LEGOs! Prefixes and suffixes are like small LEGO pieces you can add to the beginning or end of a main word (the base word) to change its meaning or its job in a sentence. For beginners, understanding these little additions can supercharge your vocabulary! Instead of learning a completely new word, you can often guess the meaning of an unfamiliar word if you know its prefix or suffix. In our dialogue, Alice and Bob are playfully discovering how these small parts change the meaning of words like “usable” to “re-usable” or “wash” to “wash-able.”

Key Phrases

Check out…: Look at this; pay attention to this.
“Check out my new shoes!”
What’s so special about it?: Asking what makes something unique or important.
“This book looks ordinary. What’s so special about it?”
Exactly!: Used to agree strongly or confirm something is correct.
“So, you mean we meet at 7 PM?” “Exactly!“
Pretty much!: Used to indicate that something is largely true or accurate, but maybe not 100%.
“Are you finished with your homework?” “Pretty much! Just one more question.”
Let’s not test that!: Used humorously to suggest not trying something risky or potentially bad.
“This chair looks strong.” “Let’s not test that! It might break.”
You got it!: Used to mean “You understand” or “You are correct.”
“So, I turn left at the traffic light?” “You got it!“
My mind is unlocked!: A fun way to say you suddenly understand something clearly.
“Ah, now I understand how to solve this puzzle! My mind is unlocked!“

Grammar Points: Prefixes & Suffixes

Prefixes

A prefix is a group of letters added to the beginning of a word to change its meaning.

un-: means “not” or “opposite of”.
happy → unhappy (not happy)
lock → unlock (opposite of lock)
re-: means “again” or “back”.
use → reuse (use again)
read → reread (read again)
dis-: means “not”, “opposite of”, or “away”.
like → dislike (not like)
appear → disappear (go away)
im-: often means “not” (used before words starting with ‘m’ or ‘p’).
possible → impossible (not possible)
polite → impolite (not polite)
eco-: relates to the environment.
friendly → eco-friendly (friendly to the environment)

Suffixes

A suffix is a group of letters added to the end of a word to change its meaning or its grammatical function (e.g., from a verb to an adjective).

-able / -ible: means “able to be” or “can be”.
wash → washable (able to be washed)
read → readable (able to be read)
sense → sensible (able to make sense)
-ful: means “full of” or “having the quality of”.
help → helpful (full of help)
beauty → beautiful (full of beauty)
-ly: often forms adverbs (describing how something is done) or adjectives (describing a noun).
quick → quickly (in a quick manner)
friend → friendly (like a friend; acting as a friend)
-er / -or: often refers to a person who does something.
teach → teacher (a person who teaches)
act → actor (a person who acts)

Practice Exercises

Exercise 1: Match the Prefix to its Meaning

Match the prefix on the left with its correct meaning on the right.

un- a) again
re- b) not
dis- c) opposite of / not
im- d) environment
eco- e) not (often before ‘m’ or ‘p’)

Exercise 2: Add the Right Suffix

Add the correct suffix (-able, -ful, or -ly) to the base word to complete the sentence.

This book is very easy to read. It’s so read____.
She gave me some really help____ advice.
He always talks loud____ in the library.
That plastic bag is not re-use____; you can only use it once.
My dog is very friend____ to strangers.

Exercise 3: Use Prefixes to Change Meaning

Change the meaning of the words using the prefixes (un-, re-, dis-).

Happy → (opposite of happy) → _________
Do → (do again) → _________
Like → (not like) → _________
Connect → (break a connection) → _________
Tie → (opposite of tie) → _________

Answers

Answers to Exercise 1: Match the Prefix to its Meaning

un- b) not
re- a) again
dis- c) opposite of / not
im- e) not (often before ‘m’ or ‘p’)
eco- d) environment

Answers to Exercise 2: Add the Right Suffix

This book is very easy to read. It’s so readable.
She gave me some really helpful advice.
He always talks loudly in the library.
That plastic bag is not re-useable; you can only use it once.
My dog is very friendly to strangers.

Answers to Exercise 3: Use Prefixes to Change Meaning

Happy → (opposite of happy) → unhappy
Do → (do again) → redo
Like → (not like) → dislike
Connect → (break a connection) → disconnect
Tie → (opposite of tie) → untie

Prefixes & Suffixes