| sneaking(adjective, move, mean, smooth, honest) |
| tricky(adjective, mean, smooth, smart, informal) |
| backstairs(adjective, close, mysterious, reticent, taciturn) |
| devious(adjective, dishonest, cunning, deceitful, dubious) |
| evasive(adjective, concealment, sneaky, secretive) |
| mysterious(adjective, obscure, strange, secret, private) |
| scheming(adjective, mean, smooth, cunning, dubious) |
| underhanded(adjective, dishonest, cunning, deceitful, unpredictable) |
| artful(adjective, mean, smooth, false, sly) |
| conspiratorial(adjective, obscure, unknown, underground, sneaky) |
| dishonest(adjective, secret, sneaky, stealthy) |
| elusive(adjective, mean, smooth, cunning, dubious) |
| hush-hush(adjective, dishonest, secret, hidden, sneaky) |
| private(adjective, obscure, secret, unknown, hidden) |
| treacherous(adjective, mean, smooth, smart, dishonest) |
| feline(adjective, feature, move, characteristic, animal) |
| hugger-mugger |
| concealed(adjective, strange, dishonest, cunning, secret) |
| guileful(adjective, mean, smooth, false, dishonest) |
| illicit(adjective, hidden, legal, fraudulent, forbidden) |