| Zimmerschlüssel | room key |
| Primärschlüssel | primary key |
| verschlüsselt | encrypted |
| zerschlissen | battered |
| verschlüsseln | encrypt cipher |
| Tenorschlüssel | tenor clef |
| Türschlüssel | door key |
| Fremdschlüssel | foreign key |
| Violinschlüssel | G clef |
| Gabelschlüssel | open end spanner |
| Inbusschlüssel | Allen wrench |
| Maulschlüssel | open end spanner |
| Notenschlüssel | clef |
| Zirkelschluss | begging the question |
| Zweitschlüssel | spare key |
| Zündschlüssel | ignition key |
| Zimmergenosse | roommate |
| Zusammenschluss | fusion merger pool union |
| niederschießen | shoot down |
| Darmverschluss | bowel bowel obstruction ileus obstruction |