entelechy (n.)

c. 1600, from Latinized form of Greek entelekheia "actuality," from en "in" (see en- (2)) + telei, dative of telos "perfection" (see telos) + ekhein "to have" (from PIE root *segh- "to hold"). In Aristotle, "the condition in which a potentiality has become an actuality."