noun
large rock; huge boulder
Literally a very large rock or boulder. Often used in figurative or emphatic contexts.
その庭には大磐石が据えられていた。
A huge boulder was placed in that garden.
Figurative use describing something as unshakable, firm, or resolute. Often used with の to modify nouns.
彼の決意は大磐石のようだ。
His determination is rock-solid.
大磐石の信念を持って交渉に臨んだ。
He entered the negotiations with an adamant conviction.