Cool MateNot negligible vs Substantial
When to use each in English, with meaning, register, and examples.
Not negligible
FormalBeyond 10,000 (less common)
Substantial
Top 2,000 (common)C1adjective
Most formal: Not negligibleMost common: Substantial
| Not negligible | Substantial | |
|---|---|---|
| Pronunciation | 🇬🇧 //nɒt ˈnɛɡlɪdʒəbl//🇺🇸 //nɑt ˈnɛɡlɪdʒəbl// | 🇬🇧 /["/səbˈstænʃl/"]/🇺🇸 /["/səbˈstænʃl/"]/ |
| Meaning | Not something you can ignore; important. | Large or important |
| Example | The effects of climate change are not negligible, affecting ecosystems worldwide. | substantial sums of money |
| Register | Formal | Neutral |
| How common | Beyond 10,000 (less common) | Top 2,000 (common) |
| CEFR level | - | C1 |
| Part of speech | adjective | |
| Collocations | not negligible difference, not negligible impact, not negligible risk, not negligible amount, not negligible evidence | substantial amount, substantial evidence, substantial change, substantial increase, substantial support |
| Antonyms | - | insignificant, minor, trivial |
| Common mistakes | Mixing up with 'negligible' and using it in the wrong context., Using 'not negligible' to describe minor issues., Assuming it can be used without context for clarity. | Confused with 'substantive' which has a different meaning., Using in place of 'significant' or 'important' without considering context., Overusing in casual contexts where simpler words like 'big' would fit better. |
| Usage notes | Use 'not negligible' when discussing facts or figures that matter significantly. It's suitable for academic, technical, or formal contexts but may sound overly complex in casual conversation. | Use 'substantial' when describing something that is significant in size, quantity, or importance. It is appropriate in both spoken and written English but might be too formal for casual conversations. |
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Frequently asked questions: Not negligible vs Substantial
What's the difference between Not negligible and Substantial?
Not negligible: Not something you can ignore; important. Substantial: Large or important
Which is more formal: Not negligible and Substantial?
Not negligible is the most formal of these.
Which is more common: Not negligible and Substantial?
Substantial is the most common in everyday English.
Can you show an example of each?
Not negligible: The effects of climate change are not negligible, affecting ecosystems worldwide. Substantial: substantial sums of money
Can I use Not negligible and Substantial interchangeably?
Not always. Not negligible and Substantial 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.