key
US /kiː/
UK /kiː/

1.
Schlüssel
a small piece of shaped metal with incisions cut to fit the wards of a particular lock, which is inserted into a lock and turned to open or close it.
:
•
I can't find my car keys.
Ich kann meine Autoschlüssel nicht finden.
•
She locked the door and put the key in her pocket.
Sie schloss die Tür ab und steckte den Schlüssel in ihre Tasche.
2.
Schlüssel, entscheidend
a thing that is of crucial importance to a situation, problem, or explanation.
:
•
Communication is the key to a successful relationship.
Kommunikation ist der Schlüssel zu einer erfolgreichen Beziehung.
•
The detective found the key piece of evidence.
Der Detektiv fand das entscheidende Beweisstück.
1.