Encara no tenim significats per a "darken fast".
1A bleak and terrible evening for all wayfarers-bitterlycold, and darkening fast.
2The entire sky was darkening fast, and the wind was dangerous, he knew.
3The day was darkening fast now towards the early evening.
4The day was now darkening fast, and heavy snow-clouds were coming down over the valley.
5In truth, the landscape, the cliffs and the meadow, the stream and the groves were darkening fast.
6The hammering sun softens, the morning turns around, darkening fast, and a hard wind shears the dunes.
7The last shot had been fired, the night was darkening fast and a mournful wind blew over the battlefield.
8The afternoon was darkening fast.
9The evening was darkening fast.
11The red sun was sinking behind the fringe of trees, and the shadowed nook in which they sat was darkening fast.
12By this time it was darkening fast, and the whole village was illumined by the glare of fires blazing all around.
13The sun was low when the two waifs turned their backs upon it, and the blue shadows in valley and ravine were darkening fast.