decrease

減る、減少する

量や数、値が以前より小さくなること。

やさしい英語で： To become smaller in amount, number, or value.

• The number of visitors decreased.
• Prices have decreased by ten percent.
• Will demand decrease next year?

使い方： decrease by an amount (Sales decreased by twenty percent.); decrease from A to B (Attendance decreased from fifty to thirty.); decrease in something (The shares decreased in value.)

類義語： fall, drop, decline

反対語： increase, rise

よく使う表現： decrease by something, decrease in value, decrease in size, decrease over time

減らす、減少させる

量や数、程度を以前より小さくすること。

やさしい英語で： To make an amount, number, or level smaller.

• Please decrease the volume.
• The company decreased its spending last month.
• Can we decrease the risk of accidents?

使い方： decrease something by an amount (We decreased the price by five pounds.); decrease something to an amount (Decrease the temperature to twenty degrees.)

類義語： reduce, lower, cut

反対語： increase, raise

よく使う表現： decrease the volume, decrease something by

減少、低下

量や数、値が以前より小さくなる変化。

やさしい英語で： A change that makes an amount, number, or value smaller.

• There was a decrease in sales.
• The town reported a sharp decrease in crime.
• A decrease in temperature is expected tonight.

使い方： a decrease in something (We noticed a decrease in noise.)

類義語： reduction, drop, decline

反対語： increase, rise

よく使う表現： decrease in something, sharp decrease

減少分、減少量

量や数、値が減った分。減る前と減った後の差。

やさしい英語で： The amount by which a number, value, or quantity becomes smaller.

• The decrease was five percent.
• We recorded a decrease of twenty customers.
• This year’s decrease was larger than last year’s.

使い方： a decrease of an amount (There was a decrease of ten percent.)

類義語： reduction, drop

反対語： increase

よく使う表現： decrease of something, annual decrease