| privater Schlüssel | private key |
| Primärschlüssel | primary key |
| Zimmerschlüssel | room key |
| Privatschule | public school |
| Bohrfutterschlüssel | drill chuck key |
| Fremdschlüssel | foreign key |
| verschlüsselt | encrypted |
| Gabelschlüssel | open end spanner |
| Haustürschlüssel | front door key front-door key |
| Kreuzschlüssel | wheel brace |
| Notenschlüssel | clef |
| Türschlüssel | door key |
| verschlüsseln | encrypt cipher |
| Privatermittler | detective |
| alter Scheißer | old fart |
| dritter Klasse | third-class |
| armer Schlucker | wretch |
| in der Scheiße | fucked |
| Frieden schließen | make peace |
| Altschlüssel | alto clef |