| English | eng-000 |
| surreptitious | |
| toskërishte | als-000 | fshehtë |
| toskërishte | als-000 | sekrete |
| العربية | arb-000 | سرّي |
| Universal Networking Language | art-253 | surreptitious |
| Universal Networking Language | art-253 | surreptitious(icl>adj,equ>clandestine) |
| Universal Networking Language | art-253 | surreptitious(icl>adj,equ>furtive) |
| asturianu | ast-000 | furtivu |
| বাংলা | ben-000 | গূঢ় |
| català | cat-000 | amagat |
| català | cat-000 | clandestí |
| català | cat-000 | encobert |
| català | cat-000 | furtiu |
| català | cat-000 | ocult |
| català | cat-000 | secret |
| català | cat-000 | sigilós |
| català | cat-000 | subreptici |
| čeština | ces-000 | kradmý |
| čeština | ces-000 | plíživý |
| čeština | ces-000 | skrytý |
| čeština | ces-000 | tajný |
| čeština | ces-000 | číhající |
| 普通话 | cmn-000 | 偷偷摸摸的 |
| 普通话 | cmn-000 | 偷偷的 |
| 普通话 | cmn-000 | 暗中的 |
| 普通话 | cmn-000 | 暗中进行的 |
| 普通话 | cmn-000 | 秘密的 |
| 普通话 | cmn-000 | 诡秘 |
| 普通话 | cmn-000 | 鬼祟的 |
| 普通话 | cmn-000 | 鬼鬼祟祟的 |
| 國語 | cmn-001 | 偷偷摸摸 |
| 國語 | cmn-001 | 偷偷摸摸的 |
| 國語 | cmn-001 | 偷偷的 |
| 國語 | cmn-001 | 暗中的 |
| 國語 | cmn-001 | 秘密的 |
| 國語 | cmn-001 | 詭秘 |
| 國語 | cmn-001 | 鬼鬼祟祟的 |
| Deutsch | deu-000 | betrügerisch |
| Deutsch | deu-000 | erschlichen |
| Deutsch | deu-000 | geheim |
| Deutsch | deu-000 | heimlich |
| Deutsch | deu-000 | im Verborgenen |
| Deutsch | deu-000 | schleichend |
| Deutsch | deu-000 | verborgen |
| Deutsch | deu-000 | verdeckt |
| Deutsch | deu-000 | verstohlen |
| Deutsch | deu-000 | vertraulich |
| eesti | ekk-000 | salatsev |
| eesti | ekk-000 | varjatult toimiv |
| ελληνικά | ell-000 | κρυφός |
| ελληνικά | ell-000 | κρύφιος |
| ελληνικά | ell-000 | λαθραίος |
| ελληνικά | ell-000 | μυστικός |
| English | eng-000 | arcane |
| English | eng-000 | backstair |
| English | eng-000 | backstairs |
| English | eng-000 | cattish |
| English | eng-000 | clandes tine |
| English | eng-000 | clandestine |
| English | eng-000 | cloak-and-dagger |
| English | eng-000 | concealed |
| English | eng-000 | covert |
| English | eng-000 | covertly |
| English | eng-000 | cryptical |
| English | eng-000 | dark |
| English | eng-000 | esoteric |
| English | eng-000 | ex-directory |
| English | eng-000 | furtive |
| English | eng-000 | hidden |
| English | eng-000 | hide |
| English | eng-000 | hole-and-corner |
| English | eng-000 | hole-in-corner |
| English | eng-000 | hugger mugger |
| English | eng-000 | hugger-mugger |
| English | eng-000 | hush-hush |
| English | eng-000 | lurking |
| English | eng-000 | mystic |
| English | eng-000 | mystical |
| English | eng-000 | occult |
| English | eng-000 | private |
| English | eng-000 | privy |
| English | eng-000 | privy to |
| English | eng-000 | quiet |
| English | eng-000 | restricted |
| English | eng-000 | sealed |
| English | eng-000 | secret |
| English | eng-000 | slinky |
| English | eng-000 | smuggled |
| English | eng-000 | sneak |
| English | eng-000 | sneaking |
| English | eng-000 | sneaky |
| English | eng-000 | snoop |
| English | eng-000 | stealthy |
| English | eng-000 | still |
| English | eng-000 | stowaway |
| English | eng-000 | sub-rosa |
| English | eng-000 | suppressible |
| English | eng-000 | theftful |
| English | eng-000 | thievish |
| English | eng-000 | ulterior |
| English | eng-000 | under wraps |
| English | eng-000 | under-the-counter |
| English | eng-000 | under-the-table |
| English | eng-000 | undercover |
| English | eng-000 | underground |
| English | eng-000 | underhand |
| English | eng-000 | underhanded |
| English | eng-000 | undisclosed |
| English | eng-000 | unlisted |
| Esperanto | epo-000 | kaŝa |
| Esperanto | epo-000 | ŝtela |
| Esperanto | epo-000 | ŝtelmaniera |
| Esperanto | epo-000 | ŝtelmova |
| euskara | eus-000 | ezkutuko |
| euskara | eus-000 | isilpeko |
| euskara | eus-000 | makur |
| euskara | eus-000 | maltzur |
| suomi | fin-000 | luvaton |
| suomi | fin-000 | maanalainen |
| suomi | fin-000 | salainen |
| suomi | fin-000 | salakähmäinen |
| suomi | fin-000 | salamyhkäinen |
| suomi | fin-000 | salassa pidetty |
| suomi | fin-000 | salavihkainen |
| suomi | fin-000 | vaivihkainen |
| français | fra-000 | cachottier |
| français | fra-000 | caché |
| français | fra-000 | clandestin |
| français | fra-000 | dérobé |
| français | fra-000 | furtif |
| français | fra-000 | secret |
| français | fra-000 | sournois |
| français | fra-000 | subreptice |
| français | fra-000 | à la dérobée |
| Gaeilge | gle-000 | faoi choim |
| galego | glg-000 | furtivo |
| galego | glg-000 | subrepticio |
| yn Ghaelg | glv-000 | fo-halloo |
| yn Ghaelg | glv-000 | gyn yss |
| ગુજરાતી | guj-000 | અપ્રામાણિક |
| ગુજરાતી | guj-000 | ચોરીથી કરેલું |
| हिन्दी | hin-000 | गुप्त |
| हिन्दी | hin-000 | चुराया |
| हिन्दी | hin-000 | चोरी का |
| हिन्दी | hin-000 | छल से किया हुआ |
| हिन्दी | hin-000 | जाली |
| हिन्दी | hin-000 | लुका-छिपा |
| hiMxI | hin-004 | xabA-xabA |
| hrvatski | hrv-000 | krišom urađen |
| hrvatski | hrv-000 | potajan |
| hrvatski | hrv-000 | tajan |
| magyar | hun-000 | alattomos |
| magyar | hun-000 | hamis |
| magyar | hun-000 | kalózkiadású |
| magyar | hun-000 | lopva tett |
| magyar | hun-000 | meg nem engedett |
| magyar | hun-000 | rejtett |
| magyar | hun-000 | tilalmas |
| magyar | hun-000 | titkos |
| magyar | hun-000 | ál |
| արևելահայերեն | hye-000 | թաքուն |
| Interlingue | ile-000 | furtiv |
| Interlingue | ile-000 | secret |
| interlingua | ina-000 | furtive |
| interlingua | ina-000 | surrepticie |
| bahasa Indonesia | ind-000 | mencuri-curi |
| bahasa Indonesia | ind-000 | rahsia |
| bahasa Indonesia | ind-000 | sulit |
| bahasa Indonesia | ind-000 | tersembunyi |
| íslenska | isl-000 | laumulegur |
| íslenska | isl-000 | leynilegur |
| íslenska | isl-000 | í laumi |
| italiano | ita-000 | clandestino |
| italiano | ita-000 | furbesco |
| italiano | ita-000 | furtivo |
| italiano | ita-000 | segreto |
| italiano | ita-000 | subdolo |
| italiano | ita-000 | surrettizio |
| 日本語 | jpn-000 | 内密 |
| 日本語 | jpn-000 | 密 |
| 日本語 | jpn-000 | 密か |
| 日本語 | jpn-000 | 密かな |
| 日本語 | jpn-000 | 密やか |
| 日本語 | jpn-000 | 忍びやか |
| 日本語 | jpn-000 | 秘か |
| 日本語 | jpn-000 | 秘かな |
| 日本語 | jpn-000 | 秘めやか |
| 日本語 | jpn-000 | 秘やか |
| 日本語 | jpn-000 | 秘密 |
| 日本語 | jpn-000 | 窃か |
| 日本語 | jpn-000 | 窃かな |
| にほんご | jpn-002 | ひそかな |
| ქართული | kat-000 | მალული |
| монгол | khk-000 | далдуур |
| монгол | khk-000 | нууц |
| монгол | khk-000 | нууцгай |
| Kurmancî | kmr-000 | dizîkî |
| Kurmancî | kmr-000 | nehînî |
| Kurmancî | kmr-000 | razberî |
| Lingua Franca Nova | lfn-000 | secreta |
| Malti | mlt-000 | bil-mohbi |
| Malti | mlt-000 | sigriet |
| Maranao | mrw-000 | siling |
| Tâi-gí | nan-003 | bih-bih-chhih-chhih |
| Tâi-gí | nan-003 | pì-bi̍t ĕ |
| Tâi-gí | nan-003 | thau-thau-á |
| Nederlands | nld-000 | clandestien |
| Nederlands | nld-000 | geniepig |
| Nederlands | nld-000 | heimelijk |
| Nederlands | nld-000 | slinks |
| Nederlands | nld-000 | stiekem |
| Nederlands | nld-000 | verdoken |
| Nederlands | nld-000 | verstolen |
| bokmål | nob-000 | hemmelig |
| bokmål | nob-000 | hemmelighetsfull |
| فارسی | pes-000 | دزدانه |
| فارسی | pes-000 | زیرجلی |
| português | por-000 | clandestino |
| português | por-000 | escondido |
| português | por-000 | furtivo |
| português | por-000 | sub-reptício |
| română | ron-000 | secret |
| română | ron-000 | taină |
| русский | rus-000 | неподлинный |
| русский | rus-000 | подпольный |
| русский | rus-000 | сделанный тайком |
| русский | rus-000 | скры́тый |
| русский | rus-000 | скрытный |
| русский | rus-000 | та́йный |
| русский | rus-000 | тайный |
| slovenčina | slk-000 | kradmý |
| slovenčina | slk-000 | pokútny |
| slovenčina | slk-000 | tajný |
| slovenščina | slv-000 | ilegalen |
| slovenščina | slv-000 | podtalen |
| slovenščina | slv-000 | potuhnjen |
| slovenščina | slv-000 | prikrit |
| slovenščina | slv-000 | skrit |
| slovenščina | slv-000 | skriven |
| slovenščina | slv-000 | skrivnosten |
| slovenščina | slv-000 | tajen |
| slovenščina | slv-000 | tajinstven |
| slovenščina | slv-000 | tatinski |
| slovenščina | slv-000 | zaupen |
| español | spa-000 | clandestino |
| español | spa-000 | furtiva |
| español | spa-000 | furtivo |
| español | spa-000 | oculto |
| español | spa-000 | secreto |
| español | spa-000 | sigiloso |
| español | spa-000 | subrepticia |
| español | spa-000 | subrepticio |
| srpski | srp-001 | krišom uraðen |
| srpski | srp-001 | potajan |
| svenska | swe-000 | dold |
| Tagalog | tgl-000 | lihim |
| Tagalog | tgl-000 | tago |
| ภาษาไทย | tha-000 | ขี้โกง |
| ภาษาไทย | tha-000 | ซึ่งทําลับๆ ล่อๆ |
| ภาษาไทย | tha-000 | ซึ่งลับๆ ล่อๆ |
| ภาษาไทย | tha-000 | ซึ่งแอบทํา |
| ภาษาไทย | tha-000 | ซ่อนเร้น |
| ภาษาไทย | tha-000 | ซ่อนเร้นในใจ |
| ภาษาไทย | tha-000 | ด้อม |
| ภาษาไทย | tha-000 | ด้อมๆ |
| ภาษาไทย | tha-000 | มีนัย |
| ภาษาไทย | tha-000 | มีเลศนัย |
| ภาษาไทย | tha-000 | มีเล่ห์กระเท่ห์ |
| ภาษาไทย | tha-000 | ลอบทํา |
| ภาษาไทย | tha-000 | ลับ ๆ ล่อ ๆ |
| ภาษาไทย | tha-000 | ลับๆ ล่อๆ |
| ภาษาไทย | tha-000 | ลึกลับ |
| ภาษาไทย | tha-000 | แอบ ๆ ซ่อน ๆ |
| ภาษาไทย | tha-000 | แอบทำ |
| ภาษาไทย | tha-000 | แอบทํา |
| ภาษาไทย | tha-000 | แอบแฝง |
| Türkçe | tur-000 | al altından |
| Türkçe | tur-000 | el altından |
| Türkçe | tur-000 | gizli |
| Türkçe | tur-000 | hile kabilinden |
| Türkçe | tur-000 | hileli olarak |
| Türkçe | tur-000 | hırsızlama |
| Türkçe | tur-000 | kaçamak |
| Türkçe | tur-000 | sahtekarca |
| Türkçe | tur-000 | sinsi |
| українська | ukr-000 | потайний |
| українська | ukr-000 | скритий |
| українська | ukr-000 | тайний |
| українська | ukr-000 | таємний |
| اردو | urd-000 | ساختہ |
| tiếng Việt | vie-000 | bí mật |
| tiếng Việt | vie-000 | gian lậu |
| tiếng Việt | vie-000 | kín đáo |
| tiếng Việt | vie-000 | lén lút |
| Bahasa Malaysia | zsm-000 | bawah tanah |
| Bahasa Malaysia | zsm-000 | mencuri-curi |
| Bahasa Malaysia | zsm-000 | pengintipan |
| Bahasa Malaysia | zsm-000 | rahsia |
| Bahasa Malaysia | zsm-000 | sulit |
| Bahasa Malaysia | zsm-000 | tersembunyi |