heedless
impartial
inferior
moderate
ordinary
unconcerned
unheeding
unimportant
uninterested
unreactive
Laodicean
Olympian
airy
aloof
apathetic
average
backward
balking
balky
benumbed
betwixt and between
blah
blase
bored
by-the-way
callous
careless
casual
centrist
chill
cold
comatose
commonplace
cool
cursory
dead
degage
desensitized
detached
devil-may-care
dilatory
dilute
diluted
disinterested
dispassionate
disregardant
disregardful
distant
distracted
distrait
dull
easy
easygoing
emotionless
equitable
even
evenhanded
everyday
friendly
hostile
lazy
polite
silent
stupid
different