This is the 2009th most frequent Swedish word.
tomma
"Tomma" means "empty" in English.
Here, 'tomma' is used as a verb meaning 'to empty' indicating the action of making something empty.
Kan du tomma glaset innan du fyller det med vatten?
Can you empty the glass before filling it with water?
In this sentence, 'tomma' is an adjective meaning 'empty,' describing the state of the room.
Rummet verkade tomma och ensamt utan någon där.
The room seemed empty and lonely with no one there.
Here, 'tomma' is an adjective meaning 'empty,' characteristic of the cardboard boxes being free of contents.