Cool MateDuty vs Function
When to use each in English, with meaning, register, and examples.
Duty
Top 1,000 (very common)B1noun
Function
Top 1,000 (very common)B1noun
| Duty | Function | |
|---|---|---|
| Pronunciation | 🇬🇧 /["/ˈdjuːti/"]/🇺🇸 /["/ˈduːti/"]/ | 🇬🇧 /["/ˈfʌŋkʃn/"]/🇺🇸 /["/ˈfʌŋkʃn/"]/ |
| Meaning | A responsibility or job that someone must do. | What something does or is used for. |
| Example | He felt it was his duty to help the less fortunate. | The main function of the heart is to pump blood throughout the body. |
| Register | Neutral | Neutral |
| How common | Top 1,000 (very common) | Top 1,000 (very common) |
| CEFR level | B1 | B1 |
| Part of speech | noun | noun |
| Collocations | contractual, legal, statutory, have, owe, carry out, call, under a/the duty, duty of, duty to, a breach of duty, do your duty by somebody, be duty bound to do something, light, onerous, day, have, pull, see, fall to somebody, manager, officer, doctor, off duty, on duty, the execution of your duties, the performance of your duties, light, onerous, day, have, pull, see, fall to somebody, manager, officer, doctor, off duty, on duty, the execution of your duties, the performance of your duties, heavy, high, low, amount, impose, slap on somebody/something, increase, be payable, in duty, duty on | important, useful, valuable, have, carry out, fulfil/fulfill, charity, official, social, hold, attend, go to, room |
| Antonyms | irresponsibility, neglect | dysfunction, malfunction |
| Common mistakes | Confused with 'dutie', incorrect spelling., Using 'duty' with a subject instead of a verb; 'duty to help' not 'duty help'., Not using it with the correct preposition, often omitting 'to'. | 'Function' is confused with 'functional' — they are different., Using 'function' when 'purpose' is more appropriate., Incorrectly pluralizing 'function' when referring to it in general terms. |
| Usage notes | Used in both formal and informal contexts. Often relates to moral or legal responsibilities. Avoid using it in casual conversations where lighter terms like 'task' may fit better. | Use 'function' when discussing what something is supposed to do. It's appropriate in technical, academic, or everyday contexts, but avoid it in very casual conversations. |
Frequently asked questions: Duty vs Function
What's the difference between Duty and Function?
Duty: A responsibility or job that someone must do. Function: What something does or is used for.
Are Duty and Function the same CEFR level?
Duty: B1, Function: B1 on the CEFR scale.
Can I use Duty and Function interchangeably?
Not always. Duty and Function 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.