Prefixes & Suffixes (Intro) — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. happy + un = unhappy
Un- means 'not', so unhappy means not happy.
2. do + re = redo
Re- means 'again', so redo means to do something again.
3. read + pre = preread
Pre- means 'before', so preread means to read before the main reading.
4. like + dis = dislike
Dis- means 'not', so dislike means to not like something.
5. lock + un = unlock
Un- reverses lock, so unlock means to open what was locked.
6. heat + pre = preheat
Pre- means 'before', so preheat means to heat before using.
7. appear + dis = disappear
Dis- flips appear, so disappear means to stop being seen.
8. write + re = rewrite
Re- means 'again', so rewrite means to write something again.
9. kind + un = unkind
Un- means 'not', so unkind means not kind.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
unhappy
→ not happy
not happy
redo
→ do again
do again
preheat
→ heat before
heat before
dislike
→ not like
not like
Matching words to meanings shows how prefixes change the base word in predictable ways.