Vocabulary Building • Word Formation
Understanding Prefixes & Suffixes
Unlock thousands of words by learning common prefixes and suffixes
Understanding prefixes and suffixes is like having a secret key to unlock the meaning of thousands of English words. A prefix is a group of letters added to the beginning of a word to change its meaning. A suffix is added to the end. By learning the most common ones, you can dramatically expand your vocabulary and improve your reading comprehension.
How Affixes Transform Words
Prefix Example:
un- + happy = unhappy (opposite meaning)
Suffix Example:
happy + -ness = happiness (adjective → noun)
Common Prefixes
Negative & Opposite Prefixes
These prefixes reverse the meaning of the root word.
| Affix | Meaning | Example |
|---|---|---|
un- | not, opposite of | happy → unhappy |
dis- | not, away from | agree → disagree |
in-, im-, il-, ir- | not, without | correct → incorrect, possible → impossible, legal → illegal, regular → irregular |
mis- | wrongly, badly | understand → misunderstand |
non- | not | sense → nonsense |
de- | opposite, from, away | frost → defrost |
anti- | against, opposing | social → antisocial |
counter- | opposite, against | act → counteract |
mal- | bad, wrong | function → malfunction |
pseudo- | false, fake | science → pseudoscience |
Time & Order Prefixes
These prefixes relate to when or in what order something happens.
| Affix | Meaning | Example |
|---|---|---|
pre- | before | view → preview |
post- | after | war → postwar |
re- | again, back | do → redo |
fore- | before | see → foresee |
neo- | new, modern | classical → neoclassical |
ex- | former, out of | president → ex-president |
mid- | middle | night → midnight |
Number & Quantity Prefixes
These prefixes specify a number or amount.
| Affix | Meaning | Example |
|---|---|---|
uni-, mono- | one | cycle → unicycle, rail → monorail |
bi-, di- | two | cycle → bicycle, oxide → dioxide |
tri- | three | angle → triangle |
multi- | many | tasking → multitasking |
poly- | many | gon → polygon |
semi- | half | circle → semicircle |
quad- | four | rant → quadrant |
penta- | five | gon → pentagon |
hexa- | six | gon → hexagon |
deca- | ten | de → decade |
cent- | hundred | ury → century |
Position & Relation Prefixes
These prefixes describe position, location, or relationship.
| Affix | Meaning | Example |
|---|---|---|
inter- | between, among | national → international |
trans- | across, beyond | atlantic → transatlantic |
sub- | under, below | marine → submarine |
super- | above, over | star → superstar |
co-, com- | with, together | worker → coworker, plete → complete |
pro- | for, forward | active → proactive |
auto- | self | biography → autobiography |
circum- | around | stance → circumstance |
intra- | within | net → intranet |
extra- | outside, beyond | ordinary → extraordinary |
para- | beside, beyond | normal → paranormal |
tele- | distant, far | phone → telephone |
Size & Degree Prefixes
These prefixes indicate size, amount, or degree of something.
| Affix | Meaning | Example |
|---|---|---|
over- | too much, excessively | sleep → oversleep |
under- | below, insufficiently | estimate → underestimate |
out- | surpassing, external | perform → outperform |
ultra- | beyond, extremely | violet → ultraviolet |
hyper- | over, above | active → hyperactive |
mega- | large, million | byte → megabyte |
micro- | small, millionth | scope → microscope |
mini- | small | bus → minibus |
macro- | large | economics → macroeconomics |
nano- | extremely small, billionth | technology → nanotechnology |
Common Suffixes
Noun Suffixes
These suffixes are added to words to form nouns, which can represent an action, state, or person.
| Affix | Meaning | Example |
|---|---|---|
-tion, -sion | act or state of | create → creation, decide → decision |
-ment | action or result | govern → government |
-ness | state or quality of | happy → happiness |
-er, -or, -ist | one who does | teach → teacher, act → actor, art → artist |
-ity | state or quality of | equal → equality |
-ship | position held, state of being | friend → friendship |
-ance, -ence | state or quality of | import → importance, differ → difference |
-hood | state or condition | child → childhood |
-ology | study of | bio → biology |
-dom | state, realm, condition | free → freedom |
-age | action, result, collection | pack → package |
-ure | action, process | fail → failure |
-ee | one who receives | employ → employee |
-ian | person concerned with | music → musician |
-ism | belief, practice, condition | capital → capitalism |
Adjective Suffixes
These suffixes turn other words into adjectives, which describe nouns.
| Affix | Meaning | Example |
|---|---|---|
-able, -ible | can be done | comfort → comfortable, edible → edible |
-al | having the quality of | nation → national |
-ful | full of | care → careful |
-less | without | care → careless |
-ous | characterized by | danger → dangerous |
-ic | having the quality of | hero → heroic |
-y | characterized by | rain → rainy |
-ish | having the quality of a | child → childish |
-ive | having the nature of | create → creative |
-ant, -ent | being in a state | import → important, differ → different |
-like | resembling | life → lifelike |
-proof | protected against | water → waterproof |
-bound | restricted to | home → homebound |
-free | without | sugar → sugar-free |
-worthy | deserving of | trust → trustworthy |
-ern | direction, location | north → northern |
Verb Suffixes
These suffixes are used to create verbs, which are action words.
| Affix | Meaning | Example |
|---|---|---|
-ate | become | active → activate |
-en | become | light → lighten |
-ify | make or become | simple → simplify |
-ize, -ise | become | modern → modernize |
-esce | begin to | fluor → fluoresce |
Adverb Suffixes
These suffixes typically turn adjectives into adverbs, describing how an action is performed.
| Affix | Meaning | Example |
|---|---|---|
-ly | in the manner of | quick → quickly |
-ward(s) | in a direction | for → forward |
-wise | in relation to | clock → clockwise |
-ways | in a manner/direction | side → sideways |
-fold | multiplied by | two → twofold |
Tips for Learning Prefixes & Suffixes
- ✓Start with the most common: Focus on un-, re-, dis-, -tion, -ness, -able first-they appear in thousands of words.
- ✓Learn word families: When you learn "create," also learn creation, creative, creativity, recreate.
- ✓Break words apart: When you encounter an unfamiliar word, look for prefixes and suffixes you recognize.
- ✓Notice spelling changes: Some suffixes change spelling (happy → happiness, create → creation).
- ✓Practice with context: Use new words in sentences to remember both meaning and usage.