博はく大だい

na-adjective, noun

large and wide; vast; broad

Describes something physically or metaphorically expansive, such as land, knowledge, or generosity. Often used in formal or literary contexts.

• 彼かれは博はく大だいな知ち識しきを持もっている。

  He has vast knowledge.

• 博はく大だいな大だい地ちが目めの前まえに広ひろがっていた。

  A vast land spread out before my eyes.