| enigmatic(adjective, mysterious, private, reticent, taciturn) |
| feline(adjective, mysterious, private, reticent, taciturn) |
| formal |
| frosty(adjective, person, feelings) |
| furtive(adjective, mysterious, private, reticent, taciturn) |
| hard-hearted(adjective, person, feelings) |
| hardhearted hateful(adjective, person) |
| hidden(adjective, quiet, reserved, secret, private) |
| hush-hush(adjective, quiet, reserved, secret, private) |
| hushed(adjective, mysterious, private, reticent, silent) |
| in chambers(expression, adjective, mysterious, reticent, taciturn) |
| in privacy(expression, adjective, mysterious, reticent, taciturn) |
| in private(expression, adjective, mysterious, reticent, taciturn) |
| in the background(expression, adjective, idiom, reticent, taciturn) |
| in the dark(expression, adjective, idiom, reticent, taciturn) |
| inaccessible(adjective, cool, cold, sensitive, shy) |
| incommunicative(adjective, taciturn) |
| indifferent(adjective, person) |
| inhospitable(adjective, cool, cold, sensitive, shy) |
| insecure(adjective, feel doubt) |