It might be helpful, Pedroski, to know how the ancients viewed the "past." For us, the past is behind us; for the ancient Greeks, the past was everything they saw before them, i.e. everything that had already been "done" (τὰ γενόμενα). The future was behind them (τὰ ὀπίσω), something that washed over them like an unseen wave from behind. So if the past is all you can see ahead of you, all that has already been "completed" (τὸ συντελικόν), then if you look beyond (ὑπέρ) that horizon, what you see is "beyond the completed," ὑπερσυντέλικον, "past perfect."