prescribed vs unarbitrary

prescribed and unarbitrary both are adjectives.

Word	Noun	Adjective	Verb	Adverb
prescribed	No	Yes	No	No
unarbitrary	No	Yes	No	No

prescribed (adjective)	unarbitrary (adjective)
formally laid down or imposed	not subject to individual determination
set down as a rule or guide
conforming to set usage, procedure, or discipline
fixed or established especially by order or command