Maintain vs Preserve vs Support vs Sustain

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

Maintain

Top 2,000 (common)B2verb

Preserve

Top 2,000 (common)B2verb

Support

Top 1,000 (very common)A2verb

Sustain

Top 2,000 (common)C1verb
Most common: Support
 MaintainPreserveSupportSustain
Pronunciation🇬🇧 //meɪnˈteɪn//🇺🇸 //meɪnˈteɪn//🇬🇧 //prɪˈzɜːv//🇺🇸 //prɪˈzɝːv//🇬🇧 /["/səˈpɔːt/","/səˈpɔːts/","/səˈpɔːtɪd/","/səˈpɔːtɪŋ/"]/🇺🇸 /["/səˈpɔːrt/","/səˈpɔːrts/","/səˈpɔːrtɪd/","/səˈpɔːrtɪŋ/"]/🇬🇧 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/🇺🇸 /["/səˈsteɪn/","/səˈsteɪnz/","/səˈsteɪnd/","/səˈsteɪnɪŋ/"]/
MeaningTo keep something in good condition or continue to have it.To keep something safe from harm or change.To give help or assistance.To keep something going or maintain it.
ExampleTo maintain a healthy lifestyle, you should exercise regularly.We need to preserve our natural resources for future generations.I want to support my friends in their endeavors.We must find ways to sustain our natural resources for the future.
RegisterNeutralNeutralNeutralNeutral
How commonTop 2,000 (common)Top 2,000 (common)Top 1,000 (very common)Top 2,000 (common)
CEFR levelB2B2A2C1
Part of speechverbverbverbverb
Collocationsmaintain order, maintain balance, maintain standards, maintain equipmentpreserve food, preserve nature, preserve culture, preserve the environmentoverwhelmingly, fervently, fully, agree to, pledge to, promise to, in, be well supported, be widely supported, support and encourage somebody/​something, overwhelmingly, fervently, fully, agree to, pledge to, promise to, in, be well supported, be widely supported, support and encourage somebody/​something, financially, generously, partially, help (to), through, financially, generously, partially, help (to), through, strongly, weakly, adequately, appear to, seem to, tend to, be supported by data, be supported by evidence, be well supportedno longer, barely, indefinitely, be able to, can, be unable to
Antonymsneglect, abandon, discontinuedestroy, neglect, wasteoppose, hinder, neglectneglect, abandon, cease
Common mistakesConfused with 'mainten' which is not a word., Using 'maintain' with uncountable nouns incorrectly., Omitting the object when using it in a sentence.Confused with 'conserve' which has a more restricted meaning., Using 'preserve' with uncountable nouns incorrectly., Misplacing 'preserve' in sentences, especially in passive forms.Confused with 'supplement', which means to add to something., Using 'support' as a noun without clarification (e.g. 'She gave support' is vague)., Mixing up 'support' and 'oppose'.'Sustain' is often confused with 'sustained' as a past form., Learners sometimes forget to add an object after 'sustain'., 'Sustain' is misused when referring to temporary situations, instead of ongoing support.
Usage notesUsed in contexts involving care, upkeep, or support. Appropriate in both spoken and written English but varies from technical discussions to daily conversation.Used to indicate the act of maintaining something in its original state. Often used in environmental and culinary contexts. Avoid informal settings.This word can be used in many contexts like emotional support, financial help, or supporting a cause. It's appropriate in both casual and formal contexts.Use 'sustain' in contexts about keeping something alive or supporting it over time. It can be formal when discussing topics like environmental issues or less formal in conversations about personal interests.

Frequently asked questions: Maintain vs Preserve vs Support vs Sustain

What's the difference between Maintain, Preserve, Support, and Sustain?

Maintain: To keep something in good condition or continue to have it. Preserve: To keep something safe from harm or change. Support: To give help or assistance. Sustain: To keep something going or maintain it.

Which is more common: Maintain, Preserve, Support, and Sustain?

Support is the most common in everyday English.

Which is more advanced: Maintain, Preserve, Support, and Sustain?

Sustain is the highest level, at C1, on the CEFR scale.

Are Maintain, Preserve, Support, and Sustain the same CEFR level?

Maintain: B2, Preserve: B2, Support: A2, Sustain: C1 on the CEFR scale.

What part of speech are Maintain, Preserve, Support, and Sustain?

Maintain: verb, Preserve: verb, Support: verb, Sustain: verb.

Can you show an example of each?

Maintain: To maintain a healthy lifestyle, you should exercise regularly. Preserve: We need to preserve our natural resources for future generations. Support: I want to support my friends in their endeavors. Sustain: We must find ways to sustain our natural resources for the future.

Can I use Maintain, Preserve, Support, and Sustain interchangeably?

Not always. Maintain, Preserve, Support, and Sustain 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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