The Last Dream of Old Oak by Hans Christian Andersen
In the forest, high up on the steep shore, and not far from the open seacoast, stood a very old oak-tree. It was just three hundred and sixty-five years old, but that long time was to the tree as the same number of days might be to us; we wake by day and sleep by night, and then we have our dreams. It is different with the tree; it is obliged to keep awake through three seasons of the year, and does not get any sleep till winter comes. Winter is its time for rest; its night after the long day of spring, summer, and autumn. On many a warm summer, the Ephemera, the flies that exist for only a day, had fluttered about the old oak, enjoyed life and felt happy and if, for a moment, one of the tiny creatures rested on one of his large fresh leaves, the tree would always say, “Poor little creature! your whole life consists only of a single day. How very short. It must be quite melancholy.”
Which words in the passage help explain the meaning of “melancholy”?