Cool MateConstant vs Fixed vs Permanent
When to use each in English, with meaning, register, and examples.
Constant
Fixed
Permanent
| Constant | Fixed | Permanent | |
|---|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈkɒnstənt/"]/🇺🇸 /["/ˈkɑːnstənt/"]/ | 🇬🇧 /["/fɪkst/"]/🇺🇸 /["/fɪkst/"]/ | 🇬🇧 /["/ˈpɜːmənənt/"]/🇺🇸 /["/ˈpɜːrmənənt/"]/ |
| Meaning | Something that stays the same and doesn't change. | Something that is not changed or is repaired. | Lasting forever or a long time without changing. |
| Example | She is a constant source of inspiration for her team. | These fixed prices give farmers a degree of financial security. | The tattoo on her arm is a permanent reminder of her travels. |
| Register | Neutral | Neutral | Neutral |
| How common | Top 2,000 (common) | Top 1,000 (very common) | Top 2,000 (common) |
| CEFR level | B2 | B1 | B2 |
| Part of speech | adjective | adjective | adjective |
| Collocations | be, remain, stay, fairly, reasonably, relatively, across, over, be, remain, stay, fairly, reasonably, relatively, across, over | be, seem, become, very, firmly, securely, be, seem, become, very, firmly, securely | be, prove, seem, almost, relatively, seemingly |
| Antonyms | variable, changing, inconstant | broken, loose, unsteady | temporary, transient, fleeting |
| Common mistakes | 'Constant' confused with 'constant' meaning an unchanged quantity in mathematics., 'Constantly' used incorrectly as an adjective instead of adverb., 'Constants' misused in plural form when referring to singular concepts. | Confusing 'fixed' with 'fixated', which means to be obsessed., Using 'fixed' in the wrong tense, like saying 'I fix the problem' instead of 'I fixed the problem.', Misplacing 'fixed' in a sentence, leading to unclear meaning. | Confused with 'temporary' which means the opposite., Using it to describe things that are not fixed like temporary jobs., Spelling errors or misuse of similar-sounding words. |
| Usage notes | Use 'constant' when discussing something that remains unchanged over time. It can be used in both formal and informal contexts, but is often used in academic or scientific discussions. | Use 'fixed' when something has been repaired or when it's stable and unchanging. Avoid in casual conversations unless referring to repairs or adjustments. | Use 'permanent' when something is fixed or unchangeable. It's suitable for both formal and everyday contexts, but avoid using it when speaking about temporary situations. |
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Frequently asked questions: Constant vs Fixed vs Permanent
What's the difference between Constant, Fixed, and Permanent?
Constant: Something that stays the same and doesn't change. Fixed: Something that is not changed or is repaired. Permanent: Lasting forever or a long time without changing.
Which is more common: Constant, Fixed, and Permanent?
Fixed is the most common in everyday English.
Are Constant, Fixed, and Permanent the same CEFR level?
Constant: B2, Fixed: B1, Permanent: B2 on the CEFR scale.
What part of speech are Constant, Fixed, and Permanent?
Constant: adjective, Fixed: adjective, Permanent: adjective.
Can you show an example of each?
Constant: She is a constant source of inspiration for her team. Fixed: These fixed prices give farmers a degree of financial security. Permanent: The tattoo on her arm is a permanent reminder of her travels.
Can I use Constant, Fixed, and Permanent interchangeably?
Not always. Constant, Fixed, and Permanent 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.