I think someone is knocking at the door
If the bolded word is 'superfluous' then it would be the words after that would help to determine the definition.
The exposition is that Bruno is very upset because his maid is packing all his things and he doesn't understand why she would be touching all of his stuff.It turns out that his father is a German officer during World War II and his job is requiring a move from Berlin to Auschwitz. ( in Poland)
Not quite sure I’d listen to the guy who commented first
