This is the 989th most frequent Catalan word.
aturar
To stop.
Here, 'aturar' means 'to stop' something that is moving.
Vaig haver d'aturar el cotxe perquè el semàfor estava en vermell.
I had to stop the car because the traffic light was red.
Here, 'aturar' is used in a formal sense to describe the suspension of an activity or process.
El projecte es va aturar temporalment per la falta de recursos.
The project was temporarily halted due to lack of resources.
In this case, 'aturar' is used figuratively, referring to halting mental activity.