Affixation
Affixation is a simple and very common way to create new words in English. Imagine you have a basic word (like "friend" or "happy"). You can add extra pieces to the start or end to change its meaning or even turn it into a different type of word. Those extra pieces are called affixes.
Affixes are "bound" — they can't stand alone as words. They need to attach to something else.
There are two main types of affixes:
Prefixes → added to the beginning of a word (word-initial).
Suffixes → added to the end of a word (word-final).
(No affix in English works as both a prefix and a suffix at the same time.)
Quick Examples
un + friend → unfriend (prefix un-)
happy + ly → happily (suffix -ly)
print + er → printer (suffix -er)
in + elegant → inelegant (prefix in-)
Prefixes vs Suffixes: The Big Differences
Do they change the word class (part of speech)?Prefixes usually do not change the word class. They keep the same type of word.
agree (verb) → disagree (still a verb)
happy (adjective) → unhappy (still an adjective)
(A few rare exceptions exist, like friend → befriend, but they're not common.)
Suffixes often do change the word class. They can turn:
sad (adjective) → sadly (adverb)
king (noun) → kingdom (still noun = class-preserving)
cavern (noun) → cavernous (adjective = class-changing)
How flexible are they with different word types?
Prefixes can often attach to many kinds of words (nouns, verbs, adjectives).
dis- works on: distaste (noun), disagree (verb), dissimilar (adjective)
Suffixes are usually more picky — most only work with one specific word class.
-ly usually attaches to adjectives to make adverbs (quick → quickly)
-ous attaches to nouns to make adjectives (danger → dangerous)
English has lots of noun suffixes and adjective suffixes. There are fewer for verbs and very few for adverbs.
Some Common & Useful Prefixes (with meanings)
Many of these are still used to make new words today, especially in tech, science, or social media.
un- = not, opposite → unhappy, unfriend, unlike
dis- = not, reverse → disagree, disappear, dislike
re- = again → redo, reboot, rethink
pre- = before → preheat, preview
post- = after → postwar, posttruth
non- = not → nonfiction, nonsense
mis- = wrong → misunderstand, misspell
anti- = against → antivirus, antisocial
inter- = between → internet, international
Some Common & Useful Suffixes
These help make nouns (lots of them!), adjectives, verbs, or adverbs.
Noun suffixes (very common):
-ness = quality → happiness, kindness, trendiness
-er / -or = person/thing that does → teacher, YouTuber, broadcaster
-ing = activity/process → swimming, recycling, hot-desking
-ity = state/quality → creativity, inclusivity
-ment = result → excitement, government (less new ones now)
-ee = person who receives/does → employee, attendee
Adjective suffixes:
-able = can be done → readable, downloadable
-ful = full of → helpful, wonderful
-ous = having quality → dangerous, famous
-ish = sort of, somewhat → childish, reddish
-y = like → rainy, funny
Verb suffixes (especially productive one):
-ize / -ise = make, cause to be → modernize, customize, anonymize
Adverb suffix:
-ly = in that way → quickly, happily (the most common by far)
A Few Extra Beginner Tips
Some affixes are very productive right now (easy to make new words with them): un-, re-, non-, -ness, -er, -able, -ish, -ize, -ie (selfie, groupie).
Others are older and less used for brand-new words: -ment.
Words can have multiple affixes: dis + organ + ise + ation → disorganisation But order and combinations follow rules (you can't mix just anything).
-ing and -ed can be confusing:
They appear as verb endings (I am walking, I have walked).
But they also make nouns (recycling) or adjectives (a walking stick, a polished floor).
English doesn't really use infixes (stuff inserted in the middle of a word), except jokingly (like "abso-bloody-lutely").
Affixation is one of the easiest ways English grows and creates new words every day — especially online and in tech! Once you spot prefixes and suffixes, you'll start seeing how almost every longer word is built from smaller meaningful pieces. Practice by taking simple words and adding un-/re-/dis- or -ness/-ly/-able to see what happens!
