optional
adjective /ˈɒpʃənl/
/ˈɑːpʃənl/
- that you can choose to do or have if you want to
- Certain courses are compulsory; others are optional.
- This model comes with a number of optional extras (= things you can choose to have but which you will have to pay extra for).
- These features can be offered as an optional part of the package.
Oxford Collocations Dictionaryverbs- be
- make something
- entirely
- purely