v reduce the level of land, as by erosion
v reduce in worth or character, usually verbally
v lower the grade of something; reduce its worth
s harmful to the mind or morals
s used of conduct; characterized by dishonor
a. 丧失体面的, 降低身份的, 有辱人格的
[法] 品质低劣的, 卑劣的, 退化的