flint
flinty
granitic
obdurate
spiritless
stony
Laodicean
Olympian
affectless
aloof
anesthetized
apathetic
arctic
autistic
benumbed
blah
blase
blunt
bowed-down
bowelless
brazen
brutal
callous
calloused
case-hardened
cast down
catatonic
chill
chilly
cold
cold as charity
cold of heart
cold-blooded
coldblooded
coldhearted
comatose
conscienceless
cool
cruel
dashed
dejected
depressed
desensitized
despairing
despondent
desponding
detached
discouraged
disheartened
disinterested
dispassionate
dispirited
dog-eat-dog
cowardly
greedy
inhuman
insolent
lawless
malicious
ruthless
selfish
shameless
thoughtless
ungrateful
unscrupulous
wanton
worthless