serving to prepare for, intervene in, or control an expected occurrence or situation, esp. a negative or difficult one; anticipatory: proactive measures against crime.
Main Entry: pro·ac·tive Pronunciation: (')prO-'ak-tiv Function: adjective : relating to, caused by, or being interference between previouslearning and the recall or performance of later learning <proactive inhibition of memory>
[proh-ak-tiv] 
tɪv