| privately(adverb, clandestine, quietly, secretly, personally) |
| in private |
| secretly(adverb, clandestine, slyly, underhandedly, surreptitiously) |
| sub rosa(expression, clandestine, quietly, personally, privately) |
| behind closed doors(adverb, quietly, secretly, personally, privately) |
| private |
| apart |
| aside |
| by stealth(expression, clandestine, quietly, secretly, personally) |
| clandestinely(adverb, clandestine, quietly, secretly, personally) |
| confidentially(adverb, quietly, secretly, personally, privately) |
| covert |
| covertly(adverb, quietly, secretly, personally, privately) |
| furtively(clandestine, quietly, secretly, personally, privately) |
| hugger-mugger |
| hush-hush(clandestine, quietly, secretly, personally, privately) |
| in confidence(expression, quietly, secretly, personally, privately) |
| in holes and corners(expression, idiom, clandestine, quietly, secretly) |
| in secret(adverb, quietly, secretly, personally, privately) |
| in strict confidence(expression, idiom, quietly, secretly, personally) |