improper vs unfit

improper and unfit both are adjectives.

Word	Noun	Adjective	Verb	Adverb
improper	No	Yes	No	No
unfit	No	Yes	Yes	No

improper (adjective)	unfit (adjective)
not suitable or right or appropriate	not in good physical or mental condition; out of condition
not appropriate for a purpose or occasion	below the required standards for a purpose
not conforming to legality, moral law, or social convention	physically unsound or diseased

improper (verb)	unfit (verb)
	make unfit or unsuitable