A sponge absorbs liquids.
Wash yourself with a sponge.
During the following time the sponge will dissolve and disappear completely.
To clean up something with a sponge
His mind was like a sponge, ready to absorb anything.
You can clear up the water you spilt with that sponge.
Please sponge the mess up of the table.
The boxing match was completely one-sided, one pug was so badly mauled that his manager had to throw in the sponge.
Sponge absorbs water so it is convenient for shading water-colours and such.
Many people think that sponge cake is difficult to bake, but if you use enough eggs, nothing can really go wrong.