Prefix Power Words: Antonyms with Un-, Dis-, and In- for Class 6 

This Grade 6 worksheet focuses on forming antonyms using common prefixes like un-, dis-, and in-. Students learn how adding prefixes changes word meanings and helps create opposites in real-life contexts. Through engaging exercises, learners build strong vocabulary, improve sentence accuracy, and develop grammar confidence. 

Why Prefix Antonyms Matter in Grammar? 

Prefix-based antonyms help students understand how word meanings can be changed systematically. For Grade 6 learners, this topic is important because: 
1. It strengthens vocabulary through word formation patterns. 
2. It improves spelling and word recognition skills. 
3. It enhances sentence correction and editing abilities. 
4. It builds confidence in understanding complex words. 

What’s Inside This Worksheet? 

This worksheet includes five structured exercises designed for practical grammar application: 

Exercise 1 – True or False 
Students identify whether the given prefix-based antonyms are used correctly in sentences. 

Exercise 2 – Sort the Words 
Students classify word pairs into prefix antonyms and not prefix antonyms. 

Exercise 3 – Fill in the Blanks 
Students choose the correct prefixed antonym from given options to complete sentences. 

Exercise 4 – Multiple Choice Questions 
Students select the correct prefixed antonym for highlighted words. 

Exercise 5 – Sentence Writing 
Students create their own sentences using antonyms formed with prefixes. 

Answer Key (For Parents & Educators) 

Exercise 1 – True / False 
1. True 
2. False 
3. True 
4. False 
5. True 
6. False 
7. True 
8. False 
9. True 
10. True 

Exercise 2 – Sort the Words 

Prefix Antonyms: 
like/dislike 
do/undo 
correct/incorrect 
known/unknown 
happy/unhappy 
honest/dishonest 
possible/impossible 
active/inactive 
fair/unfair 
clear/unclear 

Not Prefix Antonyms: 
hot/cold 
fast/slow 
tall/short 
open/close 
early/late 

Exercise 3 – Fill in the Blanks 
1. incorrect 
2. unsafe 
3. unfriendly 
4. inactive 
5. unfair 
6. dishonest 
7. impossible 
8. disagree 
9. unfinished 
10. unclear 

Exercise 4 – Multiple Choice Answers 
1. c) incorrect 
2. d) incomplete 
3. c) unkind 
4. b) inactive 
5. d) unfair 
6. b) dishonest 
7. b) impossible 
8. c) disagree 
9. a) unfinished 
10. d) unclear 

Exercise 5 – Sentence Writing 
Answers may vary. 

Help your child master word formation and antonyms using prefixes with this engaging and practical grammar worksheet. 

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