downcast

nouns

a ventilation shaft through which air enters a mine
downcast
is a type of (narrower)
a long vertical passage sunk into the earth, as for a mine or tunnel
shaft

adjectives

directed downward
"a downcast glance"
downcast
is similar to
being or moving lower in position or less in some value
"lay face down"; "the moon is down"; "our team is down by a run"; "down by a pawn"; "the stock market is down today"
down
filled with melancholy and despondency
"gloomy at the thought of what he had to face"; "gloomy predictions"; "a gloomy silence"; "took a grim view of the economy"; "the darkening mood"; "lonely and blue in a strange city"; "depressed by the loss of his job"; "a dispirited and resigned expression on her face"; "downcast after his defeat"; "feeling discouraged and downhearted"
blue, depressed, dispirited, down, down in the mouth, downcast, downhearted, gloomy, grim, low, low-spirited