-function
suffixUK /ˈfʌŋkʃən/
US /ˈfʌŋkʃən/
A part added to the end of a word that means it has a job or a purpose.
In the word 'heart function,' the suffix -function tells us about the job the heart does.
RELATED WORDS
OTHER MEANINGS
2. A special job that something or someone does.
The function of the brakes is to stop the car.
3. An organized event or party.
We went to a school function last night.
4. To work or run properly.
The old clock still functions well.