8.7 Word families: prefixes

Learn the table:

Form opposites by adding correct prefixes dis- il- im- in- ir- un-

Complete the definitions with words formed by adding prefixes to the words in capitals.
after the WAR post-war
1 the opposite of ALLOW         
2 having many COLOURS               
3 BEHAVE badly          
4 PAID too little          
5 in favour of DEMOCRACY              
6 WORK too much         
7 against NUCLEAR             
8 before the ELECTION             
9 BUILD again        
10 not PERFECT          
11 not LOGICAL          
12 the opposite of FAIR       

Complete the sentences with the correct forms of the root words in brackets.

1 With the correct training techniques, even the most             (obey) dogs can be taught to behave.
2 Our English teacher says my essay will have to be           (write) because he can't read my handwriting.
3 I               (understand) the care instructions for my shirt and shrank it in the washing machine.
4 I managed to delete most of the unnecessary apps that came               (install) on my phone.
5 If there is even the smallest              (perfect) in one of our products, this software will detect it.
6 Speaking no fewer than five languages, Pierre is truly              (lingual).
7 If you suffer from skin problems, try our new           (acne) face wash for instant results.
8 Our neighbour's cat is so skinny that I think they must be              (feed) it.
9 This paragraph of your essay is completely            (relevant), so I think you should delete it.