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Function & Purpose
Analogies

Master one of the most common analogy types on the SSAT: recognizing what something does or what it is used for, then finding the matching pair.

SSAT Middle Level: Verbal

What Is an Analogy?

An analogy is a comparison between two pairs of words that share the same type of relationship. On the SSAT, you are given the first pair and must find a second pair that mirrors it.

Hammer is to Nail as Screwdriver is to Screw

What Does Function Mean Here?

In analogy questions, function refers to what something does, and purpose refers to what something is used for. They are closely related but slightly different angles on the same idea.

Function
The action something performs: a clock tells time, a pen writes.
Purpose
The reason something exists: a helmet protects, a map guides.

Why Function Analogies Matter

Function and purpose analogies are among the most frequently tested types on the SSAT Verbal section. Recognizing them quickly gives you a reliable framework for eliminating wrong answers.

High Frequency
Appears in roughly 1 out of every 4 analogy questions on the SSAT.
Pattern Recognition
Once you spot the type, you can eliminate 2-3 choices immediately.
Vocabulary Boost
Practicing these analogies also deepens word knowledge for synonym questions.

The Core Rule

Object A Function A e.g. Knife → Cuts = Object B Function B e.g. Saw → Cuts Same type of relationship in both pairs

Watch the Direction

Function analogies can point in either direction. Sometimes the object comes first; sometimes the function does. You must match whichever direction the question uses.

Object → Function
Broom is to sweep: the object comes first, then what it does.
Function → Object
Illuminate is to lamp: the action comes first, then the thing that performs it.

Function vs. Characteristic

A common trap is confusing a function relationship with a characteristic relationship. They look similar but test different things.

Function/Purpose Characteristic/Quality
Question asked What does it do? What is it like?
Example pair Oven : bake Ice : cold
Sentence test "An oven is used to bake." "Ice is cold."
Verb type Action verb Adjective or "is" statement

How to Solve Step by Step

1
Read the given pair. Identify both words and think about how they connect.
2
Build a bridge sentence. Say: "A [word 1] is used to [word 2]" or "[word 1] is the function of [word 2]."
3
Check the direction. Is the object first or the function first? Keep this consistent.
4
Test each answer choice by plugging it into your bridge sentence.
5
Eliminate and confirm. The answer that fits your sentence with the same relationship wins.

Example 1: Basic

Scissors is to Cut as Needle is to ?
✕ Thread
Thread is a material a needle uses, not its action.
✓ Sew
"A needle is used to sew." Same relationship!
✕ Sharp
Sharp is a characteristic, not a function.

Example 2: Medium

Thermostat is to Regulate as Compass is to ?
✕ North
"North" is a direction, not a function verb.
✕ Magnetic
"Magnetic" describes how it works, a characteristic.
✓ Navigate
"A compass is used to navigate." Perfect match!

Example 3: Tricky

Camouflage is to Conceal as Beacon is to ?
✕ Bright
A characteristic, not a function.
✕ Lighthouse
A synonym/type, not a function.
✓ Signal
"A beacon is used to signal." Function match!

Common Mistakes to Avoid

✕ Picking a Characteristic
Choosing an adjective (sharp, bright, cold) instead of an action verb (cut, illuminate, freeze).
✕ Reversing Direction
If the stem goes object → function, your answer must too. Don't flip to function → object.
✕ Choosing an Association
"Compass : north" is an association, not a function. The function is "navigate," not a related noun.

Subtypes You Will See

Function Analogies Tool → Action Pen : Write Object → Purpose Helmet : Protect Worker → Task Chef : Cook Instrument → Effect Alarm : Alert Container → Contents Suitcase : Clothes Place → Activity Library : Read

The Bridge Sentence Toolkit

Here are the most useful sentence templates. Pick the one that fits, then test all answer choices with it.

1
"A [word 1] is used to [word 2]."
2
"The purpose of a [word 1] is to [word 2]."
3
"A [word 1] performs the action of [word 2]."
4
"You go to a [word 1] in order to [word 2]."

Quick Reference Table

Analogy Pair Relationship Bridge Sentence
Broom : Sweep Tool → Action A broom is used to sweep
Helmet : Protect Object → Purpose A helmet's purpose is to protect
Teacher : Educate Worker → Task A teacher's job is to educate
Siren : Warn Instrument → Effect A siren is used to warn
Hospital : Heal Place → Activity You go to a hospital to heal

Question 1 of 5

Telescope is to magnify as microscope is to ___.

Question 2 of 5

Anchor is to secure as rudder is to ___.

Question 3 of 5

Filter is to purify as lock is to ___.

Question 4 of 5

Refrigerator is to preserve as furnace is to ___.

Question 5 of 5

Arbitrator is to mediate as architect is to ___.