English Word Formation: Derivation
An interactive guide to mastering prefixes and suffixes.
Introduction
Welcome to the fascinating world of English words! Understanding how words are built is like having a superpower. It allows you to guess the meaning of new words and expand your vocabulary much faster.
One of the most common ways new words are created in English is through derivation.
What is Derivation?
Derivation is the process of forming a new word by adding a small part to the beginning or end of a root word. These small parts are called affixes.
- An affix added to the beginning of a word is a prefix. Prefixes usually change the meaning of a word.
- An affix added to the end of a word is a suffix. Suffixes often change the word's function or class (e.g., from an adjective to a noun).
Example: Root word happy (an adjective)
Add a prefix: un + happy → unhappy (changes meaning to the opposite, still an adjective).
Add a suffix: happy + ness → happiness (changes the word from an adjective to a noun).
A1 Level: The Basics
Lesson 1: The Prefix `un-` (Opposite)
The prefix un- is one of the most common negative prefixes in English. It means "not" or "the opposite of." When you add `un-` to an adjective, you create a new adjective with the opposite meaning.
| Adjective | With `un-` | Meaning |
|---|---|---|
| happy | unhappy | sad |
| lucky | unlucky | not lucky |
| safe | unsafe | dangerous |
| usual | unusual | not normal |
| friendly | unfriendly | not friendly |
Lesson 2: The Suffix `-er` (Person/Thing that does something)
The suffix -er is very useful. It can be added to a verb (an action word) to make a noun (a person or thing). This new noun is the person or thing that performs the action of the verb.
| Verb (Action) | Noun (Person/Thing) | Meaning |
|---|---|---|
| teach | teacher | a person who teaches |
| sing | singer | a person who sings |
| drive | driver | a person who drives |
| open | opener | a thing that opens (e.g., a can opener) |
Lesson 3: The Suffix `-s` / `-es` (Plurals)
The most common suffix in English is -s or -es. We add it to nouns to make them plural, which means "more than one." The rule is simple: add `-s` to most nouns, but add `-es` to nouns ending in `-s`, `-sh`, `-ch`, `-x`, or `-z` to make them easier to pronounce.
| Rule | Singular Noun | Plural Noun |
|---|---|---|
| Add `-s` | cat | cats |
| Add `-s` | book | books |
| Add `-es` (ends in -sh) | wish | wishes |
| Add `-es` (ends in -ch) | watch | watches |
| Add `-es` (ends in -x) | box | boxes |
Exercise 1.1: The Prefix `un-`
1. This chair is not comfortable. It is ______.
2. It's very cold today. This is ______ for summer.
3. Be careful! That dog is not friendly. It is ______.
4. I lost my wallet. I am so ______.
5. Don't play near the road. It's ______.
Exercise 1.2: The Suffix `-er`
1. My mom is a great . She makes delicious food. (cook)
2. He drives a bus. He is a bus . (drive)
3. Adele is a famous . I love her songs. (sing)
4. A person who writes books is a . (write)
5. He works in a factory. He is a factory . (work)
Exercise 1.3: Plurals with `-s` and `-es`
1. one book → two
2. one glass → three
3. one sandwich → two
4. one apple → five
5. one box → many
A2 Level: Expanding Vocabulary
Lesson 1: Negative Prefixes `im-`, `in-`, `ir-`, `il-`
Like `un-`, these prefixes mean "not" or "the opposite of." The prefix you use often depends on the first letter of the root word. This is to make the word easier to say. Think about how difficult it would be to say "in-possible"! "Impossible" is much smoother.
| Prefix | Rule (Used before...) | Example |
|---|---|---|
| im- | words starting with `m` or `p` | impossible, impolite, immoral |
| il- | words starting with `l` | illegal, illogical |
| ir- | words starting with `r` | irregular, irresponsible |
| in- | most other letters | incorrect, invisible, informal |
Lesson 2: Noun Suffixes `-ion` and `-ment`
These suffixes are often added to verbs to turn them into nouns. They usually describe an action, a process, or the result of an action. They are very common in English.
| Verb | Noun with `-ion` / `-tion` | Meaning of Noun |
|---|---|---|
| act | action | the process of doing something |
| decide | decision | a choice you make |
| communicate | communication | the act of sharing information |
| Verb | Noun with `-ment` | Meaning of Noun |
|---|---|---|
| agree | agreement | a promise or decision between people |
| develop | development | the process of growing or changing |
| pay | payment | an amount of money paid |
Lesson 3: Adjective Suffixes `-ful` and `-less`
These two suffixes have opposite meanings and are added to nouns to create adjectives. -ful means "full of" or "having" something. -less means "without" something.
| Noun | Adjective with `-ful` | Adjective with `-less` |
|---|---|---|
| care | careful (full of care) | careless (without care) |
| hope | hopeful (full of hope) | hopeless (without hope) |
| use | useful (full of use) | useless (without use) |
| pain | painful (full of pain) | painless (without pain) |
Exercise 2.1: Negative Prefixes
1. It is possible to see the sun at night.
2. Your answer is not correct, it is correct.
3. Driving without a license is legal.
4. The verb "to be" is an regular verb.
5. It is polite to talk with your mouth full.
Exercise 2.2: Noun Suffixes `-ion` and `-ment`
1. Thank you for the to your party. (invite)
2. We need to make a about our holiday. (decide)
3. The company needs more in its products. (develop)
4. I received the first for my new job. (pay)
5. Good is important in a relationship. (communicate)
Exercise 2.3: Suffixes `-ful` and `-less`
1. This dictionary is very ______. I use it all the time.
2. The situation is difficult, but we are ______ that it will get better.
3. The injection was surprisingly ______. I didn't feel a thing.
4. A person with no home is ______.
B1 Level: Intermediate Formation
Lesson 1: Changing Word Classes
At an intermediate level, it's important to recognize "word families." A single root word can have several forms: a noun, a verb, an adjective, and an adverb. Learning to identify and use these forms will make your English much more flexible and accurate.
| Noun | Verb | Adjective | Adverb |
|---|---|---|---|
| beauty | beautify | beautiful | beautifully |
| danger | endanger | dangerous | dangerously |
| success | succeed | successful | successfully |
| creation | create | creative | creatively |
Lesson 2: Prefixes of Attitude, Size, and Time
These prefixes add more specific and nuanced meanings to root words, allowing you to express complex ideas more precisely.
| Prefix | Meaning | Examples |
|---|---|---|
| re- | again, back | rewrite, return, rebuild |
| pre- | before | pre-war, pre-order, preview |
| post- | after | post-war, post-graduate, postpone |
| over- | too much | overeat, oversleep, overconfident |
| under- | too little, not enough | undercook, underestimate, underpaid |
| mis- | wrongly, badly | misunderstand, misbehave, misspell |
Exercise 3.1: Word Families
1. The team celebrated their after the match. (succeed)
2. She sang so that everyone was silent. (beauty)
3. It is to swim in this river. (danger)
4. He is a very artist. (create)
5. The manager completed the project . (success)
Exercise 3.2: Prefixes
Rewrite the sentence using a word with a prefix.
1. She slept too much and was late for work.
2. I think you understood me wrongly.
3. We need to heat the oven before we bake the cake.
4. He is paid not enough for the work he does.
B2 Level: Upper-Intermediate Derivation
Lesson 1: Abstract Noun Suffixes
Abstract nouns represent ideas, qualities, or states rather than concrete objects. At this level, you need to be comfortable forming them from adjectives and other nouns to express more complex thoughts, especially in writing.
| Suffix | Meaning / Use | Examples |
|---|---|---|
| -ship | State of being, relationship | friendship, leadership, partnership |
| -hood | Condition, period, collection | childhood, brotherhood, neighborhood |
| -dom | Condition, state, realm | freedom, wisdom, kingdom |
| -ness | Quality, state (from adjectives) | kindness, darkness, awareness |
| -ity | Quality, state (from adjectives, often Latin-based) | ability, security, complexity |
Lesson 2: Verb-forming Affixes (`-ise`/`-ize`, `-en`, `-ify`)
These affixes allow you to create verbs from nouns or adjectives, which is a powerful way to make your language more dynamic and varied.
| Affix | Meaning | Example Transformation |
|---|---|---|
| -ise / -ize | to make or become | modern (adj) → modernise |
| -en | to make or become | wide (adj) → widen |
| -ify | to make or cause to become | simple (adj) → simplify |
Exercise 4.1: Abstract Nouns
1. Their has lasted for over twenty years. (FRIEND)
2. He has all the qualities of good . (LEADER)
3. I have many happy memories from my . (CHILD)
4. The country fought for its for many years. (FREE)
5. We need to raise public of this issue. (AWARE)
Exercise 4.2: Verb-forming Affixes
1. We need to the instructions to make them easier. (simple)
2. As the sun set, the sky began to . (dark)
3. This course will help you your writing skills. (strong)
4. They are going to the road to reduce traffic. (wide)
C1 Level: Advanced Nuance
Lesson 1: Suffixes with Subtle Differences
At an advanced level, small differences matter. Choosing the correct suffix can completely change the meaning of a sentence. Mastering these nuances is key to sounding like a native speaker.
| Suffix Pair | Word 1 | Meaning 1 | Word 2 | Meaning 2 |
|---|---|---|---|---|
| -ic / -ical | economic | relating to the economy | economical | money-saving, efficient |
| -ic / -ical | historic | important in history | historical | relating to the study of history |
| -ic / -ical | classic | of the highest quality, timeless | classical | relating to ancient Greek/Roman culture |
Lesson 2: Greek and Latin Roots
A huge portion of advanced English vocabulary comes from Greek and Latin. Recognizing common roots, prefixes, and suffixes from these languages can help you decipher complex academic, scientific, and formal words.
| Root | Meaning | English Examples |
|---|---|---|
| -port- | carry | transport, import, portable, reporter |
| -spect- | look | inspect, respect, spectator, perspective |
| -tract- | pull | attract, contract, tractor, extract |
| -dict- | say | dictate, predict, contradict, dictionary |
Exercise 5.1: `-ic` vs `-ical` and more
1. The government introduced new ______ policies to fight inflation.
2. My new car is much more ______ on fuel than my old one.
3. The signing of the treaty was a ______ moment.
4. That film is a true Hollywood ______.
Exercise 5.2: Greek and Latin Roots
Choose the best meaning.
1. The lawyer tried to contradict the witness's statement.
2. From my perspective, the plan is too risky.
3. The volcano is expected to erupt any day now.