sponge

definition: primitive multicellular marine animal whose porous body is supported by a fibrous skeletal framework
example:
speech part: noun
synonyms: poriferan parazoan
definition: a follower who hangs around a host (without benefit to the host) in hope of gain or advantage
example:
speech part: noun
synonyms: parasite
definition: someone able to acquire new knowledge and skills rapidly and easily
example: Children soak up foreign languages like sponges.
speech part: noun
synonyms: quick study
definition: a porous mass of interlacing fibers that forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used
example:
speech part: noun
synonyms:
definition: gather sponges, in the ocean
example:
speech part: verb
synonyms:
definition: wipe with a sponge, so as to clean or moisten
example:
speech part: verb
synonyms:
definition: soak up with a sponge
example:
speech part: verb
synonyms:
definition: erase with a sponge
example:
speech part: verb
synonyms:
definition: ask for and get free
example:
speech part: verb
synonyms: bum grub mooch cadge

How sponge is being used?