Yes. It is the negative of the past participle of the verb "to concern."
e.g. The owners were unconcerned about the problems with the house.
She/He was indifferent about the mean comments everyone was throwing at him/her because she was deaf.
unconcerned, uncaring, unworried
seeming to be coolly unconcerned; indiffrent.
The opposite of curious could be apathetic, disinterested, or unconcerned.
A few big words for calm is nonchalant, unconcerned, and impassive.
predicate adjective
predicate adjective
predicate adjective
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She/He was indifferent about the mean comments everyone was throwing at him/her because she was deaf.
Putting Jews into ghettos was not a new concept. It was not that they were unconcerned, it was that they had no choice.
Unconcerned
Calmly, unconcerned or unworried.
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seeming to be coolly unconcerned; indiffrent.
Apathetic.
unconcerned, uncaring, unworried