PREFIXes are at the beginning of the word and change the meaning of the BASE
uni- 1
bi- 2
tri- 3
BASE words have thier own meaning.
SUFFIXes are at the end of a base word. They change the meaning of the word.
unicorn
prefix
base word
suffix
word meaning
unison
prefix
base word
suffix
word meaning
bicycle
prefix
base word
suffix
word meaning
biannual
prefix
base word
suffix
word meaning
triangle
prefix
base word
suffix
word meaning