大だい磐ばん石じゃく

noun

large rock; huge boulder

Literally a very large rock or boulder. Often used in figurative or emphatic contexts.

• その庭にわには大だい磐ばん石じゃくが据すえられていた。

  A huge boulder was placed in that garden.

noun, noun which may take the genitive case particle 'no'

rock-solid; firm; adamant

Figurative use describing something as unshakable, firm, or resolute. Often used with の to modify nouns.

• 彼かれの決けつ意いは大だい磐ばん石じゃくのようだ。

  His determination is rock-solid.

• 大だい磐ばん石じゃくの信しん念ねんを持もって交こう渉しょうに臨のぞんだ。

  He entered the negotiations with an adamant conviction.