Prefixes and Suffixes — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. The opposite of "agree" is disagree.
The prefix dis- means 'not' or 'opposite of.' Adding dis- to agree makes disagree.
2. A person who is full of joy is joyful.
The suffix -ful means 'full of.' Adding -ful to joy makes joyful.
3. To heat food before cooking it fully is to preheat it.
The prefix pre- means 'before.' Preheat means to heat before the main cooking.
4. The state of being sad is called sadness.
The suffix -ness means 'the state of.' Adding -ness to sad makes sadness.
5. Someone who acts in a brave way acts bravely.
The suffix -ly means 'in a way.' Adding -ly to brave makes bravely.
6. To read a book again is to reread the book.
The prefix re- means 'again.' Reread means to read again.
7. A night without rest is a restless night.
The suffix -less means 'without.' Restless means without rest.
8. The word "unfair" means not fair.
The prefix un- means 'not.' Unfair means not fair.
9. A feeling of great enjoyenjoyment filled the room.
The suffix -ment turns the verb enjoy into the noun enjoyment, meaning the state of enjoying.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
un-
→ not
again
re-
→ again
not
-ful
→ full of
full of
-less
→ without
without
un- means not, re- means again, -ful means full of, and -less means without.