unenthusiastic
warm
Laodicean
aestival
apathetic
arid
blase
blood-hot
blood-warm
calid
cold
colorless
cool
dim
dull
equatorial
faint
feeble
fervorless
forceless
genial
halfhearted
indifferent
lifeless
luke
lukewarm
marrowless
mild
neuter
neutral
nonchalant
perfunctory
pithless
room-temperature
sapless
spiritless
subtropical
summery
sunny
sunshiny
temperate
thermal
thermic
toasty
tropical
uncaring
unconcerned
unfrozen
uninterested
brackish
briny
chilly
clammy
creamy
fetid
foul-smelling
humid
milky
muddy
muggy
murky
oily
salty
soapy
stagnant
stale
steamy
viscous
watery