effective

adjective | ef·fec·tive

1. : producing a desired effect an effective revocation of the contract

2. : capable of bringing about an effect effective assistance of counsel — see also ineffective assistance of counsel

3. : being in effect

4. : equal to the rate of simple interest that yields the same amount when the rate is paid once at the end of the interest period as a quoted rate of interest does when calculated at compound interest over the same period — compare nominal