1) Aloof 2) Apathetic 3) Casual 4) Dismissive 5) Dulled 6) Incurious 7) Indifferent 8) Uncaring 9) Unenthusiastic 10) Uninteressed 1) Apathetic 2) Benumbed 3) Blase 4) Bored 5) Bored rigid 6) Bored stiff 7) Bored to death 8) Bored to tears 9) Dismissive 10) Dulled 11) Fed up 12) Inattentive 13) Indifferent 14) Jaded 15) Tired of something 
• (a.) Not having the mind or the passions engaged; as, uninterested in a discourse or narration. • (a.) Not interested; not having any interest or property in; having nothing at stake; as, to be uninterested in any business.
[adj] - not having or showing interest 2. [adj] - having no care or interest in knowing
adjective having no care or interest in knowing; `she appeared totally uninterested`
having or showing no feeling of interest; indifferent. · not personally concerned in something.