expression, godan verb (-su)
lower the quality; degrade the quality
Used when the quality of a product, service, or work is intentionally or unintentionally reduced.
コスト削減のために品質を落とすわけにはいかない。
We can't lower the quality just to cut costs.
材料を変えたら品質を落とし
Changing the materials ended up degrading the quality.