SLIEST

Least forthright

• Artful to the max

• Crafty to the max

• Foxiest

• Hardest to outwit

• Least candid

• Least straightforward

• Like the best ruse

• Like the chief fox

• Like the fox among all beasts

• Maximally cunning

• Most artful

• Most cagey

• Most clever

• Most conniving

• Most crafty

• Most cunning

• Most devious

• Most dodgy

• Most foxlike

• Most foxy

• Most furtive

• Most guileful

• Most roguish

• Most underhanded

• Superlatively foxy

• Superlatively surreptitious

• The most conniving

• Tops in cunning