Decrease vs Reduce

When to use each in English, with meaning, register, and examples.

Decrease

Top 2,000 (common)B2verb

Reduce

Top 1,000 (very common)A2verb
Most common: Reduce
 DecreaseReduce
Pronunciation🇬🇧 //dɪˈkriːs//🇺🇸 //dɪˈkriːs//🇬🇧 /["/rɪˈdjuːs/","/rɪˈdjuːsɪz/","/rɪˈdjuːst/","/rɪˈdjuːsɪŋ/"]/🇺🇸 /["/rɪˈduːs/","/rɪˈduːsɪz/","/rɪˈduːst/","/rɪˈduːsɪŋ/"]/
MeaningTo make something smaller or lower.Make something smaller in amount, size, or degree.
ExampleThe government plans to decrease taxes next year.The company plans to reduce its carbon footprint by using more sustainable materials.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR levelB2A2
Part of speechverbverb
Collocationsdecrease in size, decrease in temperature, significantly decrease, gradually decrease, decrease the riskconsiderably, dramatically, drastically, aim to, attempt to, seek to, by, in, from, an attempt to reduce something, an effort to reduce something, measures to reduce something
Antonymsincrease, rise, augmentincrease, expand, enlarge
Common mistakesConfusing 'decrease' with 'increase'., Using 'decrease' without an object, e.g. 'decrease' must have something to decrease., Incorrectly conjugating the verb in different tenses.Confused with 'deduce' which means to conclude or infer., Using 'reduce' without an object (e.g. 'reduce it' instead of directly stating what to reduce)., Mistaking 'reduce' for 'reduction' in sentences.
Usage notesUse 'decrease' in formal and neutral contexts to describe reductions, such as in appetite or temperature.Use 'reduce' when talking about making something smaller or less in quantity. It can be used formally in reports or informally in everyday conversation. Avoid using it in contexts where the increase is intended.

Frequently asked questions: Decrease vs Reduce

What's the difference between Decrease and Reduce?

Decrease: To make something smaller or lower. Reduce: Make something smaller in amount, size, or degree.

Which is more common: Decrease and Reduce?

Reduce is the most common in everyday English.

Are Decrease and Reduce the same CEFR level?

Decrease: B2, Reduce: A2 on the CEFR scale.

Can I use Decrease and Reduce interchangeably?

Not always. Decrease and Reduce are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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