| English | eng-000 |
| backstairs | |
| Afrikaans | afr-000 | onderduims |
| Afrikaans | afr-000 | onderhands |
| العربية | arb-000 | أدراج خلفية |
| العربية | arb-000 | مختف |
| luenga aragonesa | arg-000 | clandestino |
| Universal Networking Language | art-253 | backstairs(icl>adj,equ>backstair) |
| Universal Networking Language | art-253 | backstairs(icl>stairway>thing) |
| asturianu | ast-000 | clandestín |
| asturianu | ast-000 | ocultu |
| български | bul-000 | нелегален |
| български | bul-000 | таен |
| català | cat-000 | clandestí |
| català | cat-000 | escala de servei |
| català | cat-000 | secret |
| català | cat-000 | subreptici |
| čeština | ces-000 | tajný |
| čeština | ces-000 | zadní schodiště |
| čeština | ces-000 | špionážní |
| 普通话 | cmn-000 | 侧面楼梯 |
| 普通话 | cmn-000 | 厨房门 |
| 普通话 | cmn-000 | 后楼梯 |
| 普通话 | cmn-000 | 后面楼梯 |
| 普通话 | cmn-000 | 暗中 |
| 普通话 | cmn-000 | 神不知鬼不觉 |
| 普通话 | cmn-000 | 秘密 |
| 普通话 | cmn-000 | 秘密的 |
| 普通话 | cmn-000 | 诡密的 |
| 國語 | cmn-001 | 廚房門 |
| 國語 | cmn-001 | 後面樓梯 |
| 國語 | cmn-001 | 暗中 |
| 國語 | cmn-001 | 神不知鬼不覺 |
| 國語 | cmn-001 | 秘密 |
| 國語 | cmn-001 | 秘密的 |
| 國語 | cmn-001 | 臥底 |
| Hànyǔ | cmn-003 | shén bù zhī guǐ bù jue |
| Deutsch | deu-000 | Hintertreppe |
| Deutsch | deu-000 | Schwarz- |
| Deutsch | deu-000 | die |
| Deutsch | deu-000 | geheim |
| Deutsch | deu-000 | illegal |
| Deutsch | deu-000 | klandestin |
| Deutsch | deu-000 | unter der Hand |
| eesti | ekk-000 | salajane |
| eesti | ekk-000 | tagatrepp |
| ελληνικά | ell-000 | κρυφός |
| ελληνικά | ell-000 | λαθραίος |
| ελληνικά | ell-000 | πίσω σκάλα |
| ελληνικά | ell-000 | σκάλα υπηρεσίας |
| English | eng-000 | arcane |
| English | eng-000 | back-room |
| English | eng-000 | backroom |
| English | eng-000 | backstair |
| English | eng-000 | cagy |
| English | eng-000 | clandescent |
| English | eng-000 | clandestine |
| English | eng-000 | cloak-and-dagger |
| English | eng-000 | covert |
| English | eng-000 | dark |
| English | eng-000 | ex-directory |
| English | eng-000 | furtive |
| English | eng-000 | hole-and-corner |
| English | eng-000 | hugger-mugger |
| English | eng-000 | hush-hush |
| English | eng-000 | mysterious |
| English | eng-000 | mystic |
| English | eng-000 | occult |
| English | eng-000 | privy |
| English | eng-000 | restricted |
| English | eng-000 | scandalous |
| English | eng-000 | sealed |
| English | eng-000 | secret |
| English | eng-000 | secretive |
| English | eng-000 | sneak |
| English | eng-000 | sneaking |
| English | eng-000 | sordid |
| English | eng-000 | sub-rosa |
| English | eng-000 | surreptitious |
| English | eng-000 | under the counter |
| English | eng-000 | under the table |
| English | eng-000 | under wraps |
| English | eng-000 | under-the-counter |
| English | eng-000 | under-the-table |
| English | eng-000 | undercover |
| English | eng-000 | underhand |
| English | eng-000 | undisclosed |
| English | eng-000 | unlisted |
| Esperanto | epo-000 | inkognita |
| Esperanto | epo-000 | talpa |
| euskara | eus-000 | atzeko eskailera |
| euskara | eus-000 | klandestino |
| euskara | eus-000 | sekretu |
| suomi | fin-000 | huoltoportaat |
| suomi | fin-000 | salainen |
| suomi | fin-000 | salamyhkäinen |
| suomi | fin-000 | salavihkainen |
| suomi | fin-000 | takaportaat |
| suomi | fin-000 | vaivihkainen |
| suomi | fin-000 | vakoilu |
| suomi | fin-000 | vakoilu- |
| français | fra-000 | clandestin |
| français | fra-000 | escalier |
| français | fra-000 | escalier de service |
| français | fra-000 | propos |
| français | fra-000 | sous le manteau |
| français | fra-000 | sous main |
| français | fra-000 | sous-main |
| Frysk | fry-000 | geheim |
| galego | glg-000 | clandestino |
| yn Ghaelg | glv-000 | greeishyn cooyl |
| עברית | heb-000 | סודי |
| hrvatski | hrv-000 | krišom urađen |
| magyar | hun-000 | tilalmas |
| Interlingue | ile-000 | detra-scaliere |
| interlingua | ina-000 | secrete |
| bahasa Indonesia | ind-000 | licik |
| bahasa Indonesia | ind-000 | lihai |
| bahasa Indonesia | ind-000 | rahasia |
| íslenska | isl-000 | laumulegur |
| íslenska | isl-000 | neðanjarðar |
| italiano | ita-000 | clandestina |
| italiano | ita-000 | clandestino |
| italiano | ita-000 | scala di servizio |
| italiano | ita-000 | segreto |
| italiano | ita-000 | surrettizio |
| ქართული | kat-000 | საიდუმლო |
| Kurmancî | kmr-000 | nehênî |
| Kurmancî | kmr-000 | nepenî |
| 한국어 | kor-000 | 남몰래하는 |
| 한국어 | kor-000 | 뒤가 구린 |
| 한국어 | kor-000 | 뒷계단 |
| 한국어 | kor-000 | 뒷계단의 |
| 한국어 | kor-000 | 뒷층계 |
| 한국어 | kor-000 | 뒷층계의 |
| 한국어 | kor-000 | 비밀 수단 |
| 한국어 | kor-000 | 비밀히 한 |
| 한국어 | kor-000 | 스파이 활동의 |
| 한국어 | kor-000 | 스파이물의 |
| 한국어 | kor-000 | 음모 |
| 한국어 | kor-000 | 음험한 |
| 한국어 | kor-000 | 중상적인 |
| 한국어 | kor-000 | 첩보 활동 |
| latine | lat-000 | clandestinus |
| latine | lat-000 | clandestīnus |
| Nederlands | nld-000 | achtertrap |
| Nederlands | nld-000 | klandestien |
| Nederlands | nld-000 | onder de hand |
| Nederlands | nld-000 | onderhands |
| Nederlands | nld-000 | oneerlijk |
| occitan | oci-000 | clandestin |
| فارسی | pes-000 | پنهانی |
| polski | pol-000 | konspiracyjny |
| polski | pol-000 | pokątny |
| polski | pol-000 | sekretny |
| português | por-000 | clandestino |
| português | por-000 | escondido |
| português | por-000 | por baixo do pano |
| română | ron-000 | ascuns |
| română | ron-000 | clandestin |
| română | ron-000 | ocult |
| română | ron-000 | secret |
| română | ron-000 | sub acoperire |
| русский | rus-000 | закулисные интриги |
| русский | rus-000 | закулисный |
| русский | rus-000 | запасной выход |
| русский | rus-000 | лестница не для почетных посетителей |
| русский | rus-000 | позорный |
| русский | rus-000 | постыдный |
| русский | rus-000 | секретный |
| русский | rus-000 | скандальный |
| русский | rus-000 | скрытый |
| русский | rus-000 | тайный |
| русский | rus-000 | черная лестница |
| русский | rus-000 | чёрная лестница |
| slovenčina | slk-000 | pokútny |
| slovenčina | slk-000 | skrývaný |
| slovenčina | slk-000 | utajovaný |
| slovenščina | slv-000 | skriven |
| español | spa-000 | bajo mano |
| español | spa-000 | clandestina |
| español | spa-000 | clandestino |
| svenska | swe-000 | baktrappa |
| svenska | swe-000 | hemlig |
| svenska | swe-000 | smyg- |
| తెలుగు | tel-000 | రహస్య |
| ภาษาไทย | tha-000 | ทำอย่างลับ ๆ |
| ภาษาไทย | tha-000 | ที่เป็นความลับ |
| ภาษาไทย | tha-000 | บันไดหลังอาคาร |
| ภาษาไทย | tha-000 | มีเลศนัย |
| ภาษาไทย | tha-000 | ลอบทำ |
| ภาษาไทย | tha-000 | ลับ ๆ |
| ภาษาไทย | tha-000 | ลี้ลับ |
| ภาษาไทย | tha-000 | เกี่ยวกับการจารกรรม |
| ภาษาไทย | tha-000 | เกี่ยวกับการหาข่าวลับ |
| Türkçe | tur-000 | arka merdiven |
| Türkçe | tur-000 | casusluk |
| Türkçe | tur-000 | casusluk ile ilgili |
| Türkçe | tur-000 | dolaylı |
| Türkçe | tur-000 | el altından |
| Türkçe | tur-000 | el altından olan |
| Türkçe | tur-000 | gizli kapaklı |
| Türkçe | tur-000 | gizli yapılan |
| Türkçe | tur-000 | gizli yol |
| Türkçe | tur-000 | gizlice yapılan |
| Türkçe | tur-000 | macera |
| Türkçe | tur-000 | polisiye |
| Türkçe | tur-000 | çok gizli |
| українська | ukr-000 | пригодницький |
| українська | ukr-000 | прихований-і-кинжал |
| українська | ukr-000 | романтичний |
| українська | ukr-000 | секретний |
| українська | ukr-000 | шпигунський |
| tiếng Việt | vie-000 | bí mật |
| tiếng Việt | vie-000 | cầu thang sau |
| tiếng Việt | vie-000 | kín |
| tiếng Việt | vie-000 | lén lút |
| tiếng Việt | vie-000 | lối lén lút |
| tiếng Việt | vie-000 | mưu mô lém lút |
| tiếng Việt | vie-000 | ẩn |
| Bahasa Malaysia | zsm-000 | licik |
| Bahasa Malaysia | zsm-000 | lihai |