effective

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

berkesan, efektif

successful in producing a desired or intended result

:
The new policy proved to be very effective in reducing crime.
Dasar baharu terbukti sangat berkesan dalam mengurangkan jenayah.
This medicine is highly effective against the flu.
Ubat ini sangat berkesan terhadap selesema.
2.

berkuat kuasa, berlaku

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

:
The new regulations will be effective from January 1st.
Peraturan baharu akan berkuat kuasa mulai 1 Januari.
The contract is effective immediately.
Kontrak itu berkuat kuasa serta-merta.