Unconcerned a. : Not concerned; not anxious or solicitous; easy in mind; carelessly secure; indifferent; as, to be unconcerned at what has happened; to be unconcerned about the future.

Example:
What do you think of people who seem so Unconcerned about the poor in our country?

Taxonomy
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Defination from the web:
unconcerned from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... Learn more about "unconcerned" Learn more about "unconcerned" and related topics at Britannica.com. Pronunciation Symbols. Share this entry: ...