This is the 7258th most frequent Swedish word.
sander
In Swedish, "sander" does not have a standalone definition and may be a misspelling or part of a name.
Here, 'sander' is used as a verb meaning 'to send' in the simple present tense.
Han sander brev till sin vän.
He sends letters to his friend.
In this sentence, 'sander' refers to a noun meaning a tool used for sanding surfaces.
Jag använder en sander för att slipa trä.
I use a sander to sand wood.
Here, 'sander' is part of a phrase meaning to guarantee or ensure a specific quality, used metaphorically.