lethargic
spiritless
unenrgetic
Laodicean
Olympian
aloof
anemic
apathetic
asthenic
ataractic
benumbed
blah
blase
bloodless
bored
careless
casual
chicken
comatose
cool
cowardly
dead
debilitated
desensitized
detached
devil-may-care
disinterested
dispassionate
disregardful
distant
dopey
dormant
drooping
droopy
drugged
dull
easygoing
effete
enervated
etiolated
exanimate
faint
faintish
feeble
flabby
flaccid
floppy
gone
gutless
dejected
impassive
inattentive
indolent
inert
languid
lazy
lifeless
numb
pensive
sleepy
sluggish
sullen
timid
torpid
weary