Synonyms:
crafty, cunning, dodgy, foxy, guileful, knavish, slick, sly, tricksy, tricky, wily
Meaning: 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"
Usage examples
All this he did on the sly, with the greatest secrecy.
He put his finger to his lip and looked incredibly sly.
Well, and so you guessed it the moment you had my note? Sly creature!
"That is, some of us are," corrected Ned, with a sly glance at Stacy, who was eating industriously.
That sly thief had fallen into deepest poverty, and one day he had been forced to sell his beautiful tail for a bite to eat.
"On the table," replied Matvey, glancing with inquiring sympathy at his master; and, after a short pause, he added with a sly smile, "They've sent from the carriage-jobbers."
The girls found him a source of much amusement, and relieved their own disappointment at finding the "Wegg Mystery" a pricked bubble by getting McNutt excited over many sly suggestions of hidden crimes.
You won't like that part of the fun as much as you expect to, maybe," said Chris, with a sly twinkle of the eye, as he glanced at Corny and then away to the vast forest that stretched far up the mighty mountain's side.
His chief sport was the chase, and, at the right time of the year, he would go out two or three times a week, with dogs and horns and trained steeds, in search of the sly fox who would lead him and his friends a fine run.
His honor will come simply because he is in a rage or suspicious on account of my illness perhaps, and he'll dash in, as he did yesterday through impatience to search the rooms, to see whether she hasn't escaped him on the sly.