A suffix is a letter or group of letters that goes on the end of a word and changes the word's meaning.
nouns
er
teacher
player
footballer
reader
writer
ist
scientist
biologist
pianist
A prefix is a group of letters that can attach to the beginning of a root word to change its meaning.
negation
un
unlucky
something bad happens to you without a reason
unsafe
dangerous
unfriendly
not kind to someone
unfair
something that happens that isn't right or fair
unhappy
Sad
uncomfortable
something that doesn't feel nice to sit on or to wear on your body.
in
incomplete
not complete
incorrect
wrong
il
illegal
illogical
ir
irregular
irresponsible
im
impatient
immoral
time
re
replay
redo
repaint
rewrite