effective
effectiveadjective
UK/ɪˈfektɪv/US/ɪˈfektɪv/
B2successful and producing the result that you want
- This medicine is very effective against headaches.
- What's the most effective way to learn vocabulary?
UK/ɪˈfektɪv/US/ɪˈfektɪv/
B2successful and producing the result that you want