| serpentine(adjective, cunning, winding) |
| fraudulent(adjective, false, dishonest, deceitful, tricky) |
| furtive(adjective, mean, smooth, false) |
| mischievous(adjective, mean, smooth, wicked, cunning) |
| shady(adjective, dishonest, deceitful, tricky) |
| stealthy(adjective, mean, smooth, false, cunning) |
| keen(adjective, smooth, sharp, smart, intelligent) |
| clandestine(adjective, false, dishonest, secret, untrustworthy) |
| dissembling(adjective, mean, smooth, cunning, knowing) |
| misleading(adjective, false, deceitful, hypocritical) |
| secret(adjective, mean, smooth, cunning, knowing) |
| streetwise(smooth, sharp, smart, intelligent, clever) |
| surreptitious(mean, dishonest, deceitful, crafty) |
| traitorous(adjective, mean, smooth, cunning, knowing) |
| closet(hidden, fraudulent) |
| covert(mean, smooth, cunning, knowing) |
| delusory(false, deceitful, deceptive, devious) |
| illegitimate(hidden, fraudulent) |
| in holes and corners(expression, idiom, hidden, fraudulent) |
| on the quiet(expression, idiom, hidden, fraudulent) |