| Briefgeheimnis | secrecy of correspondence secrecy of letters |
| Bankgeheimnis | bank secrecy bank secret |
| Beichtgeheimnis | Seal of Confession |
| Geheimnis | secret |
| Kunstgeheimnis | trade knowledge trade secret |
| Wahlgeheimnis | election secrecy secrecy of the ballot |
| Briefchen | banknote |
| tiefgehend | profound |
| Staatsgeheimnis | state secret |
| Familiengeheimnis | family secret |
| Briefklemmer | bulldog clip |
| Briefschlitz | mail slot |
| Briefstreicher | bonefolder |
| Briefbogen | letter sheet |
| Briefbotin | letter carrier |
| Brieffreund | pen pal penfriend |
| Brieffreundin | pen pal penfriend |
| briefen | brief |
| Kriegsheldin | hero |
| Kriegerin | warrior warrioress |