indifferent to
unconcerned about
uncaring about
casual about
nonchalant about
offhand about
uninterested in
uninvolved in/with
apathetic toward
unimpressed by
bored by
weary of
unmoved by
unresponsive to
lukewarm about
unenthusiastic about
phlegmatic about
impassive
dispassionate
emotionless
insouciant
jaded
surfeited
glutted
cloyed
satiated
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