retroact

vi. 反动, 起反作用, 溯及既往 [法] 追溯既往, 有追溯效力, 反动

词形变化

retroacted retroacting retroacts 三单 retroacts retroacting 现在分词 retroacted 过去式 retroacted 过去分词

释义与例句

v.
  1. 1.

    To act retrospectively or in opposition

  2. 2.

    to be retrospective.

  3. 3.

    To apply (a law) retroactively to situations that predate the enactment of the law.

    法律

词源

From retro- + act.

来源：wiktionary