Prefixes -un, -in

The prefix in- means:

not, the opposite of or without​

​The prefix in-

The prefix un- means: not​

​The prefix un-

Prefixes un-, in-

When un- or in- are added to a base word, it makes the new word mean the opposite of the base word.

​The prefix un- changes the meaning of the base word to mean the opposite.

Multiple Choice

Which word below means the opposite if happy?

• unlucky

• happy

• uncertain

• unhappy

Multiple Choice

which word below means not scared?

• unclear

• incomplete

• unafraid

• incapable

Multiple Choice

When added to a base word, the prefix un- means _____.

• not

• past tense

• fast

• many

​The prefix in- changes the meaning of the base word to mean the opposite.

​__complete

Multiple Choice

Which word means not able to do something?

• incomplete

• incorrect

• capable

• inability

Multiple Choice

Joselin got 9 answers wrong on her math test. The teacher asked her to change her __correct answers.

• mis-

• in-

• un-

• on-

Multiple Choice

Which word below means not active?

• intrude

• inactive

• running

• invite

Sort the following words into the appropriate column

​ un-	​ in-
​	​
​	​
​	​
​	​

• inadequate

• unclear

• incoherent

• unequal​

• inconsiderate

• inefficient​

• unsteady

• unafraid​