程度・範囲・強調N1
〜と/に〜を重ねて
through repeated... / after successive... / over and over
Structure
N + を重ねて；N + に + N + を重ねて
Explanation
N + を重ねて: through repeated, accumulated actions.
Examples
試行錯誤を重ねて、ようやく成功した。
After repeated trial and error, we finally succeeded.
長い議論を重ねて、結論を出した。
After much discussion, we reached a conclusion.
Note
Common collocations: 試行錯誤を重ねる, 議論を重ねる, 失敗を重ねる. Formal.