optional

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.

As adjectives the difference between optional and arbitrary

is that optional is not compulsory; left to personal choice; elective while arbitrary is based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random.

As a noun arbitrary is

anything arbitrary, such as an arithmetical value or a fee.

As adjectives the difference between optative and optional

is that optative is expressing a wish or a choice while optional is not compulsory; left to personal choice; elective.

As a noun optative

is a mood of verbs found in some languages (e.g. Old Prussian, Ancient Greek), used to express a wish. English has no inflexional optative mood, but it has modal verbs like "might" and "may" that express possibility.

As adjectives the difference between optional and tailorable

is that optional is not compulsory; left to personal choice; elective while tailorable is capable of being made into clothing.

As adjectives the difference between potential and optional

is that potential is existing in possibility, not in actuality while optional is not compulsory; left to personal choice; elective.

As a noun potential

is currently unrealized ability (with the most common adposition being to.

As an adjective optional

is not compulsory; left to personal choice; elective.

As an adverb choicely is

with care in choosing; with attention to preference.

As an adjective optional

is not compulsory; left to personal choice; elective.

As a verb instigate is

to goad or urge forward; to set on; to provoke; to incite.

As a noun discretion

is the quality of being discreet or circumspect.

As an adjective optional is

not compulsory; left to personal choice; elective.