a shady deal.
a shady part of town.
cool umbrageous woodlands.
He established a dummy company through which he laundered vast sums of cash from shady middlemen and arms dealers.
her motives were suspect.
her shady past intrigued him.
some definitely queer goings-on.
suspicious behavior.
the shady side of the street.
the surface of the pond is dark and shadowed.
there was something fishy about the accident.
up to some funny business.
we sat on rocks in a shadowy cove.