| in holes and corners(expression, idiom, clandestine, quietly, secretly) |
| in privacy(expression, mysterious, private, reticent, taciturn) |
| in private(expression, private, reticent, taciturn, uncommunicative) |
| in secret |
| in strict confidence(expression, idiom, quietly, secretly, personally) |
| in the background(expression, idiom, mysterious, reticent, taciturn) |
| in the dark(expression, idiom, mysterious, reticent, taciturn) |
| insidiously(quietly, secretly, personally, privately, furtively) |
| intimately(quietly, secretly, personally, privately, furtively) |
| lubricious(adjective, dishonest, cunning, fickle, untrustworthy) |
| not for publication(expression, adjective, idiom, adverb, sensitive) |
| obscurely(quietly, secretly, personally, privately, furtively) |
| on the Q.T. |
| on the quiet(expression, idiom, dishonest, deceitful, clandestine) |
| private(obscure, mysterious, secret, reticent, unknown) |
| privately(clandestine, quietly, secretly, personally, slyly) |
| privily(quietly, secretly, personally, privately, furtively) |
| quietly(secretly, personally, privately, furtively, slyly) |
| reserved(mysterious, private, reticent, taciturn, uncommunicative) |
| reticent(obscure, reserved, mysterious, private, unknown) |