impartial
Olympian
aboveboard
abstract
affectless
aloof
anesthetized
apathetic
arctic
ataractic
autistic
blase
blunt
bovine
calm
candid
careless
casual
catatonic
chill
chilly
cold
cold as charity
cold-blooded
coldhearted
colorless
composed
composed serene
cool
detached
devil-may-care
disinterested
disregardful
drugged
dull
easygoing
emotionally dead
emotionless
equable
equal
equitable
even
even-tempered
evenhanded
fair
frank
frigid
frosted
analytic
businesslike
impassive
impersonal
matter-of-fact
passionless
philosophic
rational
sagacious
scholarly
self-possessed
thoughtful
unbiased
unconcerned
unemotional
compassionate
passionate