unfastened vs fastened

unfastened and fastened both are adjectives.

Word	Noun	Adjective	Verb	Adverb
unfastened	No	Yes	No	No
fastened	No	Yes	No	No

unfastened (adjective)	fastened (adjective)
not closed or secured	firmly closed or secured
not buttoned	furnished or closed with buttons or something buttonlike
not tied	fastened with strings or cords
affording unobstructed entrance and exit; not shut or closed