
beenden
to end
To bring an action, process, or state to a conclusion; to stop doing something.
Nach zwei Stunden hat der Lehrer den Unterricht beendet.
After two hours, the teacher ended the lesson.
to end
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to end
To bring an action, process, or state to a conclusion; to stop doing something.
Nach zwei Stunden hat der Lehrer den Unterricht beendet.
After two hours, the teacher ended the lesson.

to end / terminate
To dissolve or terminate a formal or contractual relationship.
Sie hat beschlossen, ihre Mitgliedschaft im Fitnessstudio zu beenden.
She decided to end her gym membership.
'Beenden' (to end) is an inseparable verb made up of the prefix 'be-' and the verb 'enden' (to end). While 'enden' describes something stopping on its own, 'beenden' always needs a person or thing that actively brings something to an end.
Der Autor hat das Buch endlich beendet.
The author finally finished the book.
The verb 'beenden' (to end) is transitive and always requires an accusative object. You always end 'etwas' (something).
Wir sollten diese Diskussion jetzt beenden.
We should end this discussion now.
When talking about completing an activity, 'beenden' (to end) is often used with these nouns: 'ein Gespräch beenden' (to end a conversation), 'die Schule beenden' (to finish school), 'ein Projekt beenden' (to finish a project), or 'eine Mahlzeit beenden' (to finish a meal).
Sie hat das Telefonat schnell beendet, weil sie gehen musste.
She quickly ended the phone call because she had to leave.
In the formal context of dissolving contracts or relationships, the following combinations are common: 'eine Beziehung beenden' (to end a relationship), 'einen Vertrag beenden' (to terminate a contract), 'die Zusammenarbeit beenden' (to end the cooperation), or 'eine Mitgliedschaft beenden' (to end a membership).
Das Unternehmen musste die Zusammenarbeit mit dem Lieferanten beenden.
The company had to end its cooperation with the supplier.
to lock / to complete
“Abschließen” and “beenden” can both indicate that an activity or project comes to an end. “Abschließen” usually emphasizes a planned or successful completion, while “beenden” initially only states that something has ended. Use “abschließen” when the result is considered complete, and “beenden” when only the stopping matters.

Nach vielen Monaten musste das Team das Projekt wegen Geldmangels beenden.
After many months, the team had to end the project because of a lack of funding.
Nach vielen Monaten konnte das Team das Projekt erfolgreich abschließen.
After many months, the team was able to successfully complete the project.