noun
Refers to the absorbent material used for cleaning, bathing, or as a tool. Also used in compound words like スポンジケーキ (sponge cake).
食器を洗うときはスポンジを使います。
I use a sponge when washing dishes.
スポンジでテーブルを拭いてください。
Please wipe the table with a sponge.
A scrubbing brush, typically stiffer and used for tougher cleaning, unlike the soft absorbent sponge.
Borrowed from English 'sponge'.