Updated on October 11, 2025

Unit 5. Time Efficiency

This unit offers vocabulary items and exercises for Unit 5. Time Efficiency, 400 words for TOEFL

Unit 5. Time Efficiency, 400 words for TOEFL Exercises and Flashcards

Wordlist for Unit 5. Time Efficiency, 400 words for TOEFL

Word

Definition

Example

adjust

to change a small amount

He had to adjust to the new climate.

arbitrary

chosen for no specific reason

His decisions were completely arbitrary so a lot of people complained.

denominator

the number written below the line in a fraction

Denominator is the bottom number of a fraction.

exponentially

at a very fast rate

The company grew exponentially.

infinitesimal

infinitely small

The amounts of radioactivity present were infinitesimal.

maximize

to increase to the maximum

Some airlines have cancelled less popular routes in an effort to maximize profits.

parallel

being an equal distance apart everywhere

There are many parallels between the stories

proportion

a section of a whole

I believe that a significant proportion of members of parliament should be women.

rate

the amount of change per unit of time

A ten percent rate is appropriate, I guess

sequence

to arrange in succession

I want you to describe all the events happening at that meeting in a correct sequence.

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