blasé
blithe
casual
detached
dégagé
indifferent
insouciant
nonchalant
uninvolved
untroubled
Laodicean
Olympian
aloof
apathetic
ataractic
benumbed
blah
blase
bored
careless
collected
comatose
composed
cool
degage
desensitized
devil-may-care
disinterested
dispassionate
disregardful
distant
dull
easy
easygoing
free and easy
heartless
hebetudinous
heedless
hopeless
impassive
in a stupor
inattentive
incurious
inexcitable
lackadaisical
languid
lethargic
listless
mindless
negligent
numb
numbed
offhand
confident
matter-of-fact
oblivious
self-possessed
tranquil
unable
unaffected
unafraid
uneventful
uninterested
unmoved
unperturbed
unresponsive
adjourned
burned
churned
concerned
discerned
earned
learned
returned
spurned
turned
unburned
unearned
unturned
yearned