regressive

形容词 regressive:

1. (of taxes) adjusted so that the rate decreases as the amount of income increases
2. opposing progress; returning to a former less advanced state

1. A type of schizophrenia, usually starting at puberty, characterized by foolish mannerisms, senseless laughter, delusions, hallucinations, and regressive behavior.
   青春期痴呆一种精神分裂症，通常始发于青春期，其特征为举止痴呆、傻笑、妄想、幻觉以及退化的举止

re.gres.sive

adj.（形容词）
Tending to return or revert.
回归的：有回归或返回的倾向的
Characterized by regression or a tendency to regress.
退化的：带有退化的特征的或有退化的倾向的
Decreasing proportionately as the amount taxed increases.
递减的：随着收税的数量增加而成比例减少的：
例句：
a regressive tax.
递减税

【引伸】
regres.sively
adv.（副词）
regres.siveness
n.（名词）