Prefixes & Suffixes (Intro) — Answer Key
Part A: Sort the Words
Sort each word or number into the correct category box.
1. Sort each word by its prefix.
Starts with un-
unsafeunkindunhappy Starts with re-
redoreplayreread Un- means not and re- means again. The first two letters tell you which prefix is attached to the base word.
Part B: Fill in the Blank
Write the missing word or number on each line.
1. Unsafe means not safe.
The prefix un- means not, so unsafe means not safe, like a road with no sidewalk.
2. Redo means to do again.
The prefix re- means again, so redo means to do something one more time.
3. Unkind means not kind.
The base word kind keeps its meaning, and un- adds not, so unkind means not kind.
4. Replay means to play again.
Replay breaks into re + play. Re- means again, so replay means to play again.
5. The prefix un- is added to the beginning of a word.
Un- is a prefix, so it goes at the beginning of the base word to change its meaning.
Part C: True or False?
Read each statement. Circle True or False.
1. Unlock means not lock.
True False
Un- means not or the opposite, so unlock means to do the opposite of lock.
2. Reread means read only one time.
True False
The prefix re- means again, so reread means to read a second time, not only once.
3. Unhappy and happy have opposite meanings.
True False
Adding un- to happy makes unhappy, which means not happy, the opposite feeling.
4. The prefix re- means stop.
True False
The prefix re- means again, not stop. Redo means do again and replay means play again.