questionable vs shady

questionable and shady both are adjectives.

Word	Noun	Adjective	Verb	Adverb
questionable	No	Yes	No	No
shady	No	Yes	No	No

questionable (adjective)	shady (adjective)
subject to question	quiet, dark, or concealed
able to be refuted	of questionable honesty or legality
	not as expected
	filled with shade