active comes from act- meaning "to do" plus the Latin suffix -ive which means "inclined to; tending to; having the character or quality of." Thus, active means "inclined to action; working; busy; lively."
She leads an active social life.
This is an active volcano.
One should have an active bank account.
Two words based on activee are activity and activate. Activity means "the state of being active; a particular action." Activate means "to make active or make capable of action."
There was little activity on the stock market today.
Can you activate this machine?