shady vs questionable

shady and questionable both are adjectives.

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

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