Increase and Its Opposite: Simple Guide

If you are learning English, you will hear the word increase very often. It means to make something larger in number, amount, size, or degree. Its direct opposite is decrease, which means to make something smaller. This guide will help you understand both words clearly, use them correctly in sentences, and avoid common mistakes.

Quick Answer: What Is the Opposite of Increase?

The most common and direct opposite of increase is decrease. Both words can be used as verbs (actions) or nouns (things). For example:

• Verb: Sales increased last month. / Sales decreased last month.
• Noun: There was an increase in temperature. / There was a decrease in temperature.

Other opposites exist depending on context, such as reduce, lower, drop, or fall. We will cover these later in the guide.

Understanding Increase and Decrease

Increase (Verb and Noun)

As a verb, increase means to become or make something greater. As a noun, it refers to the act or amount of growing.

Examples as a verb:

• The company plans to increase its staff next year.
• My English vocabulary has increased since I started studying.
• We need to increase our efforts to finish the project.

Examples as a noun:

• There was a sudden increase in the price of bread.
• The increase in temperature made everyone feel hot.
• We saw a 10% increase in website visitors.

Decrease (Verb and Noun)

As a verb, decrease means to become or make something smaller. As a noun, it refers to the act or amount of becoming smaller.

Examples as a verb:

• The doctor advised me to decrease my sugar intake.
• Student numbers have decreased this year.
• We should decrease the amount of waste we produce.

Examples as a noun:

• There was a sharp decrease in sales during the winter.
• The decrease in rainfall caused problems for farmers.
• We noticed a small decrease in the noise level.

Comparison Table: Increase vs. Decrease

Formal and Informal Use

Both increase and decrease are neutral words. You can use them in formal writing, such as reports or emails, and in casual conversation. However, in very informal speech, native speakers sometimes prefer shorter words.

Formal examples:

• The board voted to increase the annual budget.
• We must decrease operational costs immediately.

Informal examples:

• My rent went up again. (instead of increased)
• I need to cut down on coffee. (instead of decrease)

In emails, both words work well. For example:

• “We plan to increase our marketing efforts next quarter.” (professional)
• “Can we decrease the meeting time to 30 minutes?” (polite and clear)

Natural Examples in Context

Here are sentences that show how native speakers use these words naturally in different situations.

In Business

• The company reported a 15% increase in profits.
• We need to decrease our delivery time to stay competitive.

In Daily Life

• I want to increase my daily step count.
• She decided to decrease her screen time before bed.

In Education

• Practicing every day will increase your fluency.
• The teacher asked us to decrease the number of spelling errors.

In Health

• Exercise can increase your energy levels.
• You should decrease your salt intake for better blood pressure.

Common Mistakes

Even intermediate learners sometimes make errors with these words. Here are the most frequent mistakes and how to fix them.

Mistake 1: Using the Wrong Preposition

Incorrect: The price increased with 10%.
Correct: The price increased by 10%.

Use by to show the amount of change. Use to to show the final number. Example: “The price increased to $50.”

Mistake 2: Confusing Verb and Noun Pronunciation

The verb increase is pronounced with the stress on the second syllable (in-KREES). The noun increase has stress on the first syllable (IN-krees). The same rule applies to decrease. Mixing them up can confuse listeners.

Mistake 3: Using Increase When You Mean Improve

Incorrect: I want to increase my English skills.
Better: I want to improve my English skills.

Use increase for numbers or amounts. Use improve for quality or ability.

Mistake 4: Forgetting That Decrease Can Be a Noun

Incorrect: There was a decrease in temperature. (This is actually correct, but learners often avoid the noun form.)
Tip: Practice using both forms: “The temperature decreased” (verb) and “There was a decrease in temperature” (noun).

Better Alternatives and When to Use Them

Sometimes increase and decrease are not the best choice. Here are alternatives with explanations.

Instead of Increase

• Raise – Use for lifting something or making a number higher. Example: “The company decided to raise salaries.”
• Boost – Use for giving a quick improvement. Example: “Drinking water can boost your energy.”
• Expand – Use for making something larger in size or scope. Example: “We plan to expand our business to Europe.”
• Grow – Use for natural or gradual increase. Example: “Her confidence began to grow.”

Instead of Decrease

• Reduce – Very common and slightly more formal. Example: “We need to reduce waste.”
• Lower – Use for prices, volume, or intensity. Example: “Please lower the volume.”
• Cut – Use for making a sharp reduction. Example: “The company had to cut jobs.”
• Drop – Use for a sudden or noticeable decrease. Example: “Temperatures dropped overnight.”

When to Use the Original Words

Stick with increase and decrease when you want to be neutral and clear. They are safe choices for most situations, especially in writing or when you are unsure of the tone.

Mini Practice Section

Test your understanding with these four questions. Answers are below.

Question 1: Fill in the blank: The number of students has _______ from 200 to 150.
A) increased
B) decreased
C) raised

Question 2: Which sentence is correct?
A) The price increased with 5 dollars.
B) The price increased by 5 dollars.
C) The price increased to 5 dollars.

Question 3: Choose the best word: I want to _______ my speaking skills.
A) increase
B) improve
C) raise

Question 4: True or False: The word “decrease” can be used as both a verb and a noun.

Answers:

1. B) decreased (The number went from 200 to 150, which is smaller.)
2. B) The price increased by 5 dollars. (Use “by” for the amount of change.)
3. B) improve (Skills are about quality, not quantity.)
4. True. “Decrease” works as a verb (“Sales decreased”) and a noun (“a decrease in sales”).

Frequently Asked Questions

1. What is the difference between “decrease” and “reduce”?

Both mean to make something smaller. Decrease often describes something that becomes smaller naturally or gradually. Reduce is more active and implies someone is making a deliberate effort. For example: “The population decreased” (natural change) vs. “We reduced costs” (active decision).

2. Can I use “increase” with uncountable nouns?

Yes. You can say “increase in traffic,” “increase in patience,” or “increase in knowledge.” The word works with both countable and uncountable nouns.

3. Is “increase” always positive?

No. While increase often sounds positive (e.g., increase in salary), it can be negative in context. For example: “There was an increase in crime” or “an increase in pollution.” The tone depends on what is increasing.

4. What is a simple way to remember the opposite pair?

Think of a thermometer. When the number goes up, it is an increase. When it goes down, it is a decrease. The prefix “de-” often means “down” or “away,” which can help you remember.

Final Tips for Learners

To master these words, practice using them in both verb and noun forms. Write three sentences today using increase and three using decrease. Try to use them in different contexts, such as talking about money, weather, or your studies. The more you use them, the more natural they will feel.

For more beginner vocabulary pairs, visit our Beginner Vocabulary Pairs section. If you have questions, check our FAQ page or contact us.