decision
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decision
The choice between several possibilities or alternatives that leads to a result or action.
Die Entscheidung, den Job zu wechseln, ist mir nicht leichtgefallen.
The decision to change jobs was not easy for me.
'Entscheidung' is derived from the verb 'entscheiden' (to decide). The ending '-ung' is a typical way of forming nouns from verbs in German. These nouns are always feminine ('die').
Ich muss mich schnell entscheiden.
I have to decide quickly.
The most important and most common verb combination is 'eine Entscheidung treffen' (to make a decision). Learners often incorrectly use '*eine Entscheidung machen'.
Wir müssen bald eine Entscheidung über den Urlaubsort treffen.
We have to make a decision about the vacation destination soon.
To express what someone decides for or against, the prepositions 'für' (for) or 'gegen' (against) + accusative are used.
Die Entscheidung für diesen Studiengang war richtig.
The decision in favor of this degree program was the right one.
In the context of sports or competitions, the verb 'fallen' (to fall) is often used to describe the moment of the result. So the decision 'fällt' (falls/is decided).
Beim Elfmeterschießen fiel die Entscheidung erst mit dem letzten Schuss.
In the penalty shootout, the decision came only with the final shot.
choice / election
'die Wahl' and 'die Entscheidung' are closely related because both involve being faced with several possibilities. 'die Wahl' tends to emphasize the available options or the process of choosing. 'die Entscheidung' tends to emphasize the result: you have made up your mind and act accordingly. So you can say: first you have 'die Wahl', then you make 'eine Entscheidung' (a decision). The words can be confused because both occur when choosing. If several options are important, use 'Wahl' rather than 'Entscheidung'; if the fixed result is important, use 'Entscheidung' rather than 'Wahl'.
Zu Hause hat mein Bruder nach dem Gespräch eine klare Entscheidung getroffen.
At home, after the conversation, my brother made a clear decision.
Bei der Arbeit hatte das Team die Wahl zwischen zwei Terminen für die Prüfung.
At work, the team had the choice between two dates for the exam.