"proactive" in the adjective sense
1. proactive
descriptive of any event or stimulus or process that has an effect on events or stimuli or processes that occur subsequently
"proactive inhibition"
"proactive interference"
2. proactive
of a policy or person or action) controlling a situation by causing something to happen rather than waiting to respond to it after it happens
Source: WordNet® (An amazing lexical database of English)
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