optional

As a noun chosen

is .

As an adjective optional is

not compulsory; left to personal choice; elective.

As adjectives the difference between operational and optional

is that operational is of or relating to operations, especially military operations while optional is not compulsory; left to personal choice; elective.

As adjectives the difference between optional and undefined

is that optional is not compulsory; left to personal choice; elective while undefined is lacking a definition or value.

As adjectives the difference between concessional and optional

is that concessional is of, relating to, or being a concession; concessionary while optional is not compulsory; left to personal choice; elective.

As adjectives the difference between optional and raucous

is that optional is not compulsory; left to personal choice; elective while raucous is harsh and rough-sounding.

As adjectives the difference between autonomous and optional

is that autonomous is self-governing intelligent, sentient, self-aware, thinking, feeling, governing independently while optional is not compulsory; left to personal choice; elective.

As an adjective optional

is not compulsory; left to personal choice; elective.

As a verb recommend is

to bestow commendation on; to represent favourably; to suggest, endorse or encourage as an appropriate choice.

As an adjective optional

is not compulsory; left to personal choice; elective.

As a verb recommended is

(recommend).

As an adverb any

is to even the slightest extent, at all.

As a determiner any

is at least one; of at least one kind one at all.

As a pronoun any

is any thing(s) or person(s).

As an adjective optional is

not compulsory; left to personal choice; elective.

As adjectives the difference between optional and optionary

is that optional is not compulsory; left to personal choice; elective while optionary is alternative form of optional.