Cool MateHence vs Thereby
When to use each in English, with meaning, register, and examples.
Hence
FormalTop 3,000 (common)B2adverb
Thereby
FormalBeyond 10,000 (less common)C1adverb
Most common: Hence
| Hence | Thereby | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/hens/"]/🇺🇸 /["/hens/"]/ | 🇬🇧 /["/ˌðeəˈbaɪ/"]/🇺🇸 /["/ˌðerˈbaɪ/"]/ |
| Meaning | for that reason | in that way; as a result |
| Example | We suspect they are trying to hide something, hence the need for an independent inquiry. | Regular exercise strengthens the heart, thereby reducing the risk of heart attack. |
| Register | Formal | Formal |
| How common | Top 3,000 (common) | Beyond 10,000 (less common) |
| CEFR level | B2 | C1 |
| Part of speech | adverb | adverb |
| Collocations | hence the need, henceforth, hence it follows | thereby improving, thereby increasing, thereby allowing |
| Antonyms | therefore, thus | indirectly, without effect, in no way |
| Common mistakes | Using 'hence' incorrectly as a standalone sentence., Confusing 'hence' with 'therefore' when they have slightly different usages., Forgetting to use a comma before 'hence' when it starts a new clause. | Using 'thereby' in informal speech when it's not appropriate., Confusing 'thereby' with 'therefor', which has a different meaning., Neglecting to pair 'thereby' with a gerund. |
| Usage notes | Used in writing or formal speech to explain outcomes or reasons. It may feel too formal in casual conversations. | Use 'thereby' in formal writing to indicate the result of an action. It's less common in everyday conversation and may sound overly formal. |
Frequently asked questions: Hence vs Thereby
What's the difference between Hence and Thereby?
Hence: for that reason Thereby: in that way; as a result
Which is more common: Hence and Thereby?
Hence is the most common in everyday English.
Are Hence and Thereby the same CEFR level?
Hence: B2, Thereby: C1 on the CEFR scale.
Can I use Hence and Thereby interchangeably?
Not always. Hence and Thereby 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.