1. 毁损：derogate 贬损 | derogation 毁损 | derogative 减损的

2. derogation的反义词

2. 减损：Derlin 缩醛树脂 | derogation 减损 | derrick arrangement 吊杆布置

3. 贬低：derocker 清石机 除石机 | derogation 贬低 | derogatory 减阶的

1. (law) the partial taking away of the effectiveness of a law
    a partial repeal or abolition of a law

    e.g. any derogation of the common law is to be strictly construed

2. a communication that belittles somebody or something

    Synonym: disparagementdepreciation