dejected
blue
bowed-down
cast down
dashed
depressed
despairing
despondent
desponding
disconsolate
discouraged
disheartened
dispirited
down
downcast
drooping
droopy
feeling low
heartless
hypochondriac
hypochondriacal
in low spirits
in the depths
in the doldrums
in the dumps
languishing
low
low-spirited
miserable
pessimistic
pining
sad
spiritless
subdued
suicidal
weary of life
woebegone
world-weary