stained vs unstained

stained and unstained both are adjectives.

Word	Noun	Adjective	Verb	Adverb
stained	No	Yes	No	No
unstained	No	Yes	No	No

stained (adjective)	unstained (adjective)
marked or dyed or discolored with foreign matter	not stained
having a coating of stain or varnish	without soil or spot or stain
	(of reputation) free from blemishes
	not having a coating of stain or varnish