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reverse side
opposite (of the expected)
purl stitch (knitting)
試験対策が裏目に出て、点数を落としてしまった。
My exam preparation backfired, and I ended up losing points.
監督の采配が裏目に出て、敗北した。
The coach's strategy backfired, resulting in defeat.
無理な計画は裏目に出る。
Unreasonable plans often backfire.