The Swedish term "dysterhet, mörker" matches the English term "gloom"

other swedish words that include "dysterhet" : english :
vemod, svårmod, melankoli, dysterhet, tungsint melancholy
other swedish words that include "mörker" : english :
mörker blackness
ligga i mörker darkle
mörker darkness
mörkerseende night-vision