Where does “retroactive” come from?

Retroactive comes from French rétroactif, from French actif, from Latin activus, derived from the Latin verb agere meaning to do or drive, ultimately from Proto-Indo-European h₂eǵ-.

retroactive (English): Extending in scope, effect, application or...

Definitions

  1. Extending in scope, effect, application or...

Ancestry of “retroactive”, step by step

StepLanguageWordMeaning
1Frenchrétroactifretroactive
2Frenchactifactive; asset; top
3Old Frenchactifactive
4Latināctīvusactive
5Ancient GreekἐνεργητικόςAble to act on; acting on; Active; In the active...
6Ancient Greekἐνεργέωto be in action or activity, to operate; to...
7Ancient Greekἐνεργόςat work, active
8Ancient Greekἐν-in, within; on
9Ancient Greekἐνin, on, at; among; in, at, or during the time of
10Ancient Greekδέρμαskin, hide
11Ancient Greekγλυφήcarving, carved work; hole cut
12Ancient Greek-ῐ́ᾱ{{l|en|-ia}}; "suffix forming abstract feminine...
13Proto-Indo-European-íh₂
14Proto-Indo-European-h₂Creates collective nouns, which refer to groups...

Words derived from “retroactive

Every word from Proto-Indo-European -h₂