English Reference

Word

sustainable

Phoneticssus·tain·able

US/səˈsteɪnəbəɫ/

UK/səstˈeɪnəbəl/

Definitions

01environmentally friendly

B2 · Upper Intermediate

adj. able to continue for a long time without damaging the environment or using up all the natural resources.

adj. capable of being maintained at a steady level without exhausting natural resources or causing severe ecological damage.

“The company is switching to sustainable packaging made from recycled paper.”

“The government is investing in sustainable urban development to ensure that future generations have access to clean water and green spaces.”

Synonyms

renewablegreeneco-friendly

02able to be maintained

B2 · Upper Intermediate Academic

adj. able to be kept at a certain level or speed for a long time.

adj. capable of being sustained or continued at a specific rate or level; often used in economic or physical contexts.

“The current rate of spending is not sustainable and will lead to debt.”

“Economists argue that a ten percent annual growth rate is not sustainable in the long term for a developed nation.”

Synonyms

maintainableviablefeasible

Antonyms

untenableshort-lived

Collocations

Common phrases and expressions where native English speakers use the word “sustainable” in context.

Verb

01. achieve sustainable growth

“The CEO explained that the primary goal for the next decade is to achieve sustainable growth.”

verb + adj + noun

02. become more sustainable

“The fashion industry needs to become more sustainable to reduce its massive water footprint.”

verb + adv + adj

03. promote sustainable farming

“The government introduced new subsidies to promote sustainable farming practices across the country.”

verb + adj + noun

Adjective

04. environmentally sustainable

“The company is committed to using environmentally sustainable materials in all its packaging.”

adv + adj

05. sustainable development

“The United Nations promotes sustainable development to balance economic growth and nature conservation.”

adj + noun

06. sustainable for the future

“Current levels of plastic consumption are simply not sustainable for the future of our oceans.”

adj + prep + noun

Noun

07. sustainable energy sources

“Investing in sustainable energy sources like wind and solar is crucial for reducing carbon emissions.”

adj + noun + noun

08. sustainable way of living

“Many people are moving to the countryside to adopt a more sustainable way of living.”

adj + noun + of + noun

Real-World Examples

“There is no single way to transition to more sustainable livestock farming globally.”
Phys.org 15 Aug 2026
“Single-use packaging, like small sauce packets and mini shampoo bottles in hotels, will also be banned in 2030 where considered unnecessary or if there are more sustainable alternatives available.”
The Local 12 Aug 2026
“This discovery could have cost-effective and sustainable applications in future electronic devices and other technologies.”
Phys.org 15 Aug 2026

Etymology

From sustain + -able.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

Word family

ADJECTIVE

sustainable(B2)

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Common
Level
B2 · Upper IntermediateOxford
Updated

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English Reference