noun
Refers to a sponge as an object or material, often in technical or descriptive contexts.
この素材はスポンジ状で、水をよく吸う。
This material is sponge-like and absorbs water well.
noun which may take the genitive case particle 'no'
spongy; spongiform
Describes a texture or structure resembling a sponge; often used with の to modify nouns.
スポンジ状のケーキはふわふわしている。
The sponge-like cake is fluffy.