What's the difference between i.e. and e.g.?
late 14c., "a place where cardinals meet to elect a pope," from Italian conclave, from Latin conclave "a room, chamber suite," probably originally "a room which may be locked," from com- "together" (see com-) + clavis "a key" (see slot (n.2)). Extended sense of "private assembly" is first recorded 1560s.