英汉词典

1. 提高，增进，增加（价值、质量、吸引力等）
    To enhance something means to improve its value, quality, or attractiveness.

enhance的反义词

    e.g. They'll be keen to enhance their reputation abroad...
           他们会非常渴望提高他们在国外的声誉。
    e.g. The superb sets are enhanced by Bobby Crossman's marvellous costumes.
           博比·克罗斯曼绝妙的服装为华丽的舞台增色不少。