Ethernesseth-er-nis

n. The wistful feeling of looking around a gathering of loved ones, all too aware that even though the room is filled with warmth and laughter now, it won't always be this way--that the coming years will steadily break people away into their own families, or see them pass away one by one, until there comes a time when you'll look back and try to imagine what it felt like to have everyone together in the same place.