optionally
op-tion-al-ly
adverb
In a way that is not compulsory; available to be chosen but not required.
"You can optionally add a side salad."
Thesaurus
Antonyms: obligatorily
op-tion-al-ly
In a way that is not compulsory; available to be chosen but not required.
"You can optionally add a side salad."
Antonyms: obligatorily