adverb
also sli·ly
Etymology: Middle English slily, from sli sly + -ly
: in a sly manner: as
a. : shrewdly
pointed his remarks by slyly wagging his forefinger — G.B.Shaw
b. : with covert cunning : subtly
offered her slyly insolent condolences on being married to a barbarian — Charles Kingsley
c. : in a surreptitious way : furtively
glanced slyly
slyly in love with their colleagues — H.T.Moore
slyly injected commercials — New Yorker
d. : artfully , roguishly