mass noun
darkness or thick mist that makes it difficult to see
黑暗, 昏暗; 迷雾, 浓雾：
my eyes were straining to see through the murk of the rainy evening.
我努力透过昏暗的雨夜张望。
archaic murky; gloomy
〈古〉黑暗的, 昏暗的。
词源
Old English mirce, of Germanic origin; reinforced in Middle English by Old Norse myrkr.