Knavish Definition

not straightforward or candid; giving a false appearance of frankness

attractive especially by means of smallness or prettiness or quaintness; "a cute kid with pigtails

of uncertain outcome; especially fraught with risk

made slick by e.g. ice or grease; "sidewalks slick with ice

not to be trusted; "how extraordinarily slippery a liar the camera is"- James Agee having concealed difficulty