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Er hat mit dem Rauchen aufgehört.
He has stopped smoking.
To stop doing something, either permanently or temporarily.
Kannst du bitte mit dem Lärm aufhören?
Can you please stop making noise?
Sie hat beschlossen, mit dem Trinken aufzuhören.
She decided to stop drinking.
Often used with 'mit' + dative to specify what is being stopped.
To cease functioning or operating (for machines or systems).
Der Motor hat plötzlich aufgehört zu arbeiten.
The engine suddenly stopped working.
Used in technical contexts to describe mechanical or electronic failures.
Remember that 'aufhören' is a separable verb, so in perfect tenses, the prefix 'auf-' moves to the end of the sentence.
The meaning can vary slightly depending on whether it's used for actions, habits, or mechanical functions.
From Middle High German 'aufhœren', from 'auf-' (up) + 'hœren' (to stop).
The verb is separable, meaning the prefix 'auf-' can be separated in certain grammatical constructions.