ill-advised vs unadvised

ill-advised and unadvised both are adjectives.

Word	Noun	Adjective	Verb	Adverb
ill-advised	No	Yes	No	No
unadvised	No	Yes	No	No

As adjectives, ill-advised and unadvised are synonyms defined as:

ill-advised and unadvised: without careful prior deliberation or counsel

ill-advised (adjective)	unadvised (adjective)
without careful prior deliberation or counsel	without careful prior deliberation or counsel
	having received no information