I am confused on how to say "vacuum"
Is it "pasar el aspirador" or is it "al vacío"?
3 Answers
'pasar el aspirador' or 'pasar la aspiradora', depending on the country or even on the size of the vacuum cleaner. 'al vacío' is unrelated to cleaning. It's used to say that you've put something in a vacuum, as with a food vacuum sealer: 'comida envasada al vacío'
"Al vacío" means "vacuum-packed". As Bill said, it is either pasar el aspirador or la aspiradora.
In Spain, the verb is "pasar la aspiradora." The noun is "la aspiradora."