大たい愚ぐ

noun

great folly; great fool

Literary or formal term for extreme foolishness or a person who embodies it. Often used in classical or elevated contexts.

• 彼かれの決けつ断だんはまさに大たい愚ぐと言いうべきだ。

  His decision can truly be called great folly.

• 大たい愚ぐのそしり