aufhören
to stop
To end or interrupt an activity or action. Often used with 'mit' or an infinitive with 'zu'.
Kannst du bitte aufhören, mit dem Stift zu klicken?
Can you please stop clicking the pen?

to stop
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to stop
To end or interrupt an activity or action. Often used with 'mit' or an infinitive with 'zu'.
Kannst du bitte aufhören, mit dem Stift zu klicken?
Can you please stop clicking the pen?

'Aufhören' (to stop) is a separable verb. In a main clause, the prefix 'auf' comes at the end. In subordinate clauses and in the infinitive with 'zu', 'auf' and 'hören' stay together.
Hör bitte mit dem Lärm auf!
Please stop making that noise!
To say what someone stops doing, there are two common constructions: 'aufhören mit' + noun in the dative, or 'aufhören, zu' + infinitive of another verb.
Sie hat mit dem Projekt aufgehört.
She stopped working on the project.
When an event ends, the subject of 'aufhören' is often an impersonal phenomenon. It is especially often used for weather such as rain, snow, or wind.
Der Schneefall hat erst am Morgen aufgehört.
The snowfall did not stop until morning.
to let / to have
'lassen' and 'aufhören' can both mean that an action ends. 'aufhören' describes neutrally that someone stops an activity, often with 'mit' or with 'zu'. In this meaning, 'lassen' often sounds like a command: someone should no longer do something or should refrain from doing it altogether. 'Hör auf zu reden' (stop talking) and 'Lass das Reden' (stop the talking) are similar, but 'Lass das!' (stop that!) is more direct and can sound stricter.

Wegen des Regens hören wir mit dem Training früher auf.
Because of the rain, we stop training earlier.
Im Unterricht sagt die Lehrerin: „Lass bitte das Spielen mit dem Handy.“
In class, the teacher says, "Please stop playing with your phone."