Antonyms of adj sly

1 sense of sly

Sense 1
crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, tricky, wily -- (marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dick"; "a wily old attorney")

INDIRECT (VIA artful) -> artless -- (simple and natural; without cunning or deceit; "an artless manner"; "artless elegance")

Similarity of adj sly

1 sense of sly

Sense 1
crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, tricky, wily -- (marked by skill in deception; "cunning men often pass for wise"; "deep political machinations"; "a foxy scheme"; "a slick evasive answer"; "sly as a fox"; "tricky Dick"; "a wily old attorney")
       => artful (vs. artless) -- (marked by skill in achieving a desired end especially with cunning or craft; "the artful dodger"; "an artful choice of metaphors")