retroactivo
retroactive
adjective rreh-troh-ahk-TEE-boh Rare
Origin: From Latin retro (backwards) + activus (active).
Also means
backdated
Usage Note
Retroactivo describes a law, payment, or measure that applies to events before it was enacted. The phrase con carácter retroactivo ('with retroactive effect') is standard in legal and administrative Spanish. The corresponding adverb is retroactivamente and the noun is retroactividad.
Examples
"El aumento salarial será retroactivo a enero."
Natural Translation
The pay rise will be retroactive to January.

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