This is the 3249th most frequent Swedish word.
stoppa
"Stoppa" means "to stop" or "to put/place" in English.
The verb 'stoppa' in this context means 'to put' or 'to place something inside'.
Jag måste stoppa mina kläder i ryggsäcken.
I need to put my clothes in the backpack.
Here, 'stoppa' is used in the sense of 'to prevent' or 'to end'.
Vi måste stoppa mobbningen i skolan.
We need to stop the bullying in school.
In this sentence, 'stoppa' refers to 'bringing something to a halt' or 'ceasing movement'.