| Zentralschlüssel | master key |
| Generalschlüssel | master key passe-partout passkey |
| Tenorschlüssel | tenor clef |
| entschlüsseln | decipher decode decrypt |
| Zweitschlüssel | spare key |
| Zündschlüssel | ignition key |
| Entschluss | decision |
| entschlossen | determined resolute decided |
| Gabelschlüssel | open end spanner |
| Maulschlüssel | open end spanner |
| Altschlüssel | alto clef |
| Bettschüssel | bedpan |
| Funkschlüssel | fob |
| Primärschlüssel | primary key |
| verschlüsselt | encrypted |
| zerschlissen | battered |
| Autoschlüssel | car key |
| Inbusschlüssel | Allen wrench |
| Meeranschluss | access to the sea |
| Notenschlüssel | clef |