This is the 10404th most frequent Swedish word.
kastar
"Throws."
Here, 'kastar' is used as the verb 'to throw', denoting the action of throwing an object.
Hon kastar bollen till sin bror.
She throws the ball to her brother.
In this sentence, 'kastar' again functions as 'to throw', showing disposal of an item.
Han kastar smörgåsen i soptunnan.
He throws the sandwich into the trash bin.
Here, 'kastar' represents the act of tossing or throwing stones into a body of water.