degrade
UK/dɪ'greɪd/US/di'greid/
IELTSTOEFL六级C2
释义
v.
To lower in quality, rank, or condition.
降低质量；降级。
v.
To treat someone with contempt; to humiliate.
贬低，侮辱。
v.
(Chemistry) to break down into simpler substances.
（化学）使分解，降解。
词根拆分
词根派生de-（向下）+ grade（grad- 形式，台阶/等级）= 往下降一级。从降低等级延伸到降低质量（信号变差）、贬损尊严（羞辱性对待）、化学分解（塑料降解）。
词根 gress 还连着 64 个词常用搭配
- 1.degrade quality降低质量
- 2.degrade performance降低性能
例句
- 1.
Repeated copying degrades the image quality.
反复复制会降低图像质量。
- 2.
The prisoners were treated in degrading conditions.
囚犯们被置于有辱人格的环境中。
- 3.
These materials degrade harmlessly in soil.
这些材料在土壤中可无害降解。