1 having power to produce, or producing, a desired result: These new teaching methods have proved very effective.
az: səmərəli, effektiv
ru: эффективный
2 striking or pleasing: an effective display of flowers.
az: təsirli
ru: эффектный
3 in operation; working; active: The new law becomes effective next week.
az: işlək
ru: действующий