Antonyms and Opposites

In this lesson, you will learn all about antonyms — words that have opposite meanings. The CEM 11+ exam frequently tests antonyms, and the questions can appear in different formats: matching pairs, odd-one-out, or choosing the word most opposite in meaning to a given word. Being confident with antonyms will help you answer quickly and accurately.

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What Is an Antonym?

An antonym is a word that means the opposite of another word.

Word	Antonym
Hot	Cold
Light	Dark
Happy	Sad
Brave	Cowardly
Ancient	Modern

Antonyms come in different types. Understanding these types helps you spot them more easily in the exam.

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Three Types of Antonyms

1. Gradable Antonyms

These are opposites that sit at either end of a scale. There are degrees between them.

Scale example
Freezing — cold — cool — warm — hot — boiling
Tiny — small — medium — large — huge — enormous

You can be quite hot or very hot, so the opposites are not absolute.

2. Complementary Antonyms

These are absolute opposites — there is nothing in between.

Word	Antonym
Alive	Dead
True	False
Present	Absent

Something is either alive or dead — there is no middle ground.

3. Relational Antonyms

These are pairs where one word cannot exist without the other. They describe a relationship from opposite sides.

Word	Antonym
Teacher	Pupil
Buy	Sell
Parent	Child
Give	Receive

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Making Antonyms with Prefixes

One of the most useful skills for the CEM exam is knowing how to create antonyms by adding a prefix. Here are the most important ones:

Prefix	Meaning	Examples
un-	not	unhappy, unkind, unclear, unusual
in-	not	incomplete, incorrect, invisible
im-	not (before m, p, b)	impossible, immature, impatient
il-	not (before l)	illegal, illegible, illogical
ir-	not (before r)	irregular, irresponsible, irrelevant
dis-	not; opposite of	disagree, disappear, dishonest
mis-	wrongly	misunderstand, misplace, misbehave
non-	not	nonsense, non-fiction, non-stop

Top Tip: The CEM exam loves to test whether you know which prefix goes with which word. You cannot say "unpossible" — it must be "impossible". There is no shortcut here; you need to learn the correct pairings.

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