effective

US /əˈfek.tɪv/
UK /əˈfek.tɪv/
"effective" picture
1.

efectivo, eficaz

successful in producing a desired or intended result

:
The new policy proved to be very effective in reducing crime.
La nueva política resultó ser muy efectiva para reducir el crimen.
This medicine is highly effective against the flu.
Este medicamento es muy efectivo contra la gripe.
2.

efectivo, en vigor

(of a law or agreement) coming into operation or effect

:
The new regulations will be effective from January 1st.
Las nuevas regulaciones serán efectivas a partir del 1 de enero.
The contract is effective immediately.
El contrato es efectivo de inmediato.