"Retroactively" is a word in ENGLISH

Lat Now for then. A phrase applied to acts allowed to be done after the time when they should be …

Directed back; attended by reflection; retroactive; introspective.

A prefix or combining form signifying backward, back; as, retroact, to act backward; retrospect, a looking back.

To act backward, or in return; to act in opposition; to be retrospective.

Action returned, or action backward.

Operation on something past or preceding.

Fitted or designed to retroact; operating by returned action; affecting what is past; retrospective.

Having reference to what is past; affecting things past; retroactive; as, a retrospective law.