| surreptitious(adjective, quiet, dishonest, secret) |
| covert(adjective, quiet, secret, hidden) |
| clandestine(adjective, quiet, dishonest, secret, hidden) |
| underhand(adjective, quiet, dishonest, cunning, deceitful) |
| arch(mean, smooth, cunning, knowing) |
| artful(adjective, mean, smooth, cunning) |
| canny(adjective, mean, smooth, cunning, knowing) |
| sharp(adjective, mean, smooth, cunning, knowing) |
| shrewd(adjective, mean, smooth, cunning, knowing) |
| foxy(adjective, mean, smooth, false) |
| scheming(adjective, mean, smooth, cunning, knowing) |
| cagey(mean, smooth, cunning, knowing) |
| ingenious(mean, smooth, cunning, knowing) |
| intriguing(quiet, mean, smooth, cunning, knowing) |
| slippery(dishonest, cunning, deceitful, devious) |
| smooth(mean, cunning, knowing, crafty) |
| calculating(adjective, mean, smooth, cunning, knowing) |
| conniving(adjective, mean, smooth, cunning, knowing) |
| devious(adjective, dishonest, cunning, deceitful, knowing) |
| double-dealing(mean, smooth, cunning, knowing) |