頭ず脳のう明めい晰せき

noun, na-adjective

clearheaded; sharp-minded; brilliant mind

A yojijukugo describing someone with a lucid, penetrating intellect. Often used in formal or written contexts to praise mental acuity.

• 彼かれは頭ず脳のう明めい晰せきで、どんな難なん問もんもすぐに解かい決けつする。

  He is so sharp-minded that he solves any difficult problem right away.