| English | eng-000 |
| under wraps | |
| 普通话 | cmn-000 | 秘密的 |
| 國語 | cmn-001 | 秘密的 |
| English | eng-000 | arcane |
| English | eng-000 | backstair |
| English | eng-000 | backstairs |
| English | eng-000 | covert |
| English | eng-000 | dark |
| English | eng-000 | ex-directory |
| English | eng-000 | hush-hush |
| English | eng-000 | mystic |
| English | eng-000 | occult |
| English | eng-000 | privy |
| English | eng-000 | restricted |
| English | eng-000 | sealed |
| English | eng-000 | secret |
| English | eng-000 | sneak |
| English | eng-000 | sneaking |
| English | eng-000 | sub-rosa |
| English | eng-000 | surreptitious |
| English | eng-000 | under-the-counter |
| English | eng-000 | under-the-table |
| English | eng-000 | undercover |
| English | eng-000 | undisclosed |
| English | eng-000 | unlisted |
| suomi | fin-000 | salainen |
| suomi | fin-000 | salassa |
| íslenska | isl-000 | hafa hljótt um |
| íslenska | isl-000 | halda leyndu |
| 日本語 | jpn-000 | 密 |
| português | por-000 | às escuras |
| русский | rus-000 | в та́йне |
| русский | rus-000 | секретный |
| español | spa-000 | en secreto |