| aside |
| apart |
| backstairs(mysterious, private, reticent, taciturn, covert) |
| buttoned up(expression, mysterious, private, reticent, taciturn) |
| cagey(mysterious, private, reticent, taciturn, covert) |
| clammed up(expression, mysterious, private, reticent, taciturn) |
| close(mysterious, private, reticent, taciturn, uncommunicative) |
| close-mouthed(mysterious, private, reticent, taciturn, uncommunicative) |
| covert(mysterious, private, reticent, taciturn, uncommunicative) |
| cryptic(mysterious, private, reticent, taciturn, covert) |
| enigmatic(mysterious, private, reticent, taciturn, covert) |
| feline(mysterious, private, reticent, taciturn, covert) |
| furtive(mysterious, private, reticent, taciturn, covert) |
| hushed(mysterious, private, reticent, taciturn, covert) |
| in privacy(expression, mysterious, private, reticent, taciturn) |
| in private(expression, mysterious, private, reticent, taciturn) |
| in the background(expression, idiom, mysterious, reticent, taciturn) |
| in the dark(expression, idiom, mysterious, reticent, taciturn) |
| on the QT(expression, idiom, mysterious, reticent, taciturn) |
| privately |