校こうを重かさねる

expression, ichidan verb

proofread repeatedly; go through multiple rounds of proofreading

Used when a text is checked and corrected many times, often in publishing or academic contexts. The phrase implies careful, iterative revision.

• 原げん稿こうは校こうを重かさねて、ようやく完かん成せいした。

  The manuscript was proofread again and again, and finally completed.

• この本ほんは校こうを重かさねて誤あやまりをなくした。

  This book was proofread repeatedly to eliminate errors.