retroact

Verb

 * 1) To act retrospectively, or in return; to act in opposition; to be retrospective.
 * 2)  To apply (a law) retroactively to situations that predate the enactment of the law.
 * 1)  To apply (a law) retroactively to situations that predate the enactment of the law.

Translations

 * French:
 * Italian: