す

noun

cavity; hollow; pore; bubble; blowhole

Refers to small internal voids or air pockets, especially in old root vegetables (like daikon), tofu, metal castings, or similar materials. Often used in cooking and manufacturing contexts.

• この大だい根こんはすが入はいっていて、味あじが落おちている。

  This daikon has cavities inside, so the flavor is worse.

• 鋳い物ものにすがあると強きょう度どが下さがる。

  If there are blowholes in the casting, the strength decreases.

noun which may take the genitive case particle 'no'

porous; spongy; pithy

Describes a texture or structure full of small holes, like a sponge or pithy vegetable. Used attributively with の.

• すの入はいった大だい根こんは煮に物ものに向むかない。

  A spongy daikon is not suitable for simmered dishes.