effective
US /əˈfek.tɪv/
UK /əˈfek.tɪv/

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.