inattentive indifferent nonchalant oblivious uninterested uninvolved unmoved unperturbed unruffled unsympathetic untroubled aloof blind blithe callous careless cold cool deaf detached dispassionate distant easy feckless forgetful hard-hearted hardened heedless impassive incurious insensible insensitive insouciant lackadaisical lukewarm negligent neutral phlegmatic relaxed reserved self-centered serene stony supine unbothered unworried