Cool MateMaintain vs Sustain
When to use each in English, with meaning, register, and examples.
| Maintain | Sustain | |
|---|---|---|
| Meaning | To keep something in good condition or continue to have it. | To keep something going or maintain it. |
| CEFR level | B2 | C1 |
| Part of speech | verb | verb |
| Usage notes | Used in contexts involving care, upkeep, or support. Appropriate in both spoken and written English but varies from technical discussions to daily conversation. | 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 Sustain
What's the difference between "Maintain" and "Sustain"?
"Maintain" means: To keep something in good condition or continue to have it. "Sustain" means: To keep something going or maintain it.
When should I use "Maintain" and "Sustain"?
They can all be used in everyday English.
Are "Maintain" and "Sustain" the same CEFR level?
"Maintain" is at B2, "Sustain" is at C1 on the CEFR scale.