sponge

Any of various marine invertebrates of the phylum Porifera, that have a porous skeleton often of silica.

A piece of porous material used for washing (originally made from the invertebrates, now often made of plastic).

A porous material such as sponges consist of.

informalA heavy drinker.

A type of light cake.

UKA type of steamed pudding.

slangA person who takes advantage of the generosity of others (abstractly imagined to absorb or soak up the money or efforts of others like a sponge).

A person who readily absorbs ideas.

A form of contraception that is inserted vaginally; a contraceptive sponge.

Any sponge-like substance.

bakingDough before it is kneaded and formed into loaves, and after it is converted into a light, spongy mass by the agency of the yeast or leaven.

Iron from the puddling furnace, in a pasty condition.

Iron ore, in masses, reduced but not melted or worked.

A mop for cleaning the bore of a cannon after a discharge. It consists of a cylinder of wood, covered with sheepskin with the wool on, or cloth with a heavy looped nap, and having a handle, or staff.

slangTo take advantage of the kindness of others.

“He has been sponging off his friends for a month now.”

intransitive with onuponTo get by imposition; to scrounge.

“to sponge a breakfast”

To deprive (somebody) of something by imposition.

To clean, soak up, or dab with a sponge.

To suck in, or imbibe, like a sponge.

To wipe out with a sponge, as letters or writing; to efface; to destroy all trace of.

bakingTo be converted, as dough, into a light, spongy mass by the agency of yeast or leaven.

marine biologyof dolphinsTo use a piece of wild sponge as a tool when foraging for food.

Ask for and get free; be a parasite

Erase with a sponge; as of words on a blackboard

Gather sponges, in the ocean