aloof apathetic callous detached diffident disinterested distant haughty heartless impartial impervious inattentive neutral nonchalant uncaring unconcerned uninvolved unresponsive unsympathetic blase cold cool dispassionate equitable heedless highbrow listless nonpartisan objective passionless phlegmatic regardless scornful silent stoical supercilious superior unaroused unbiased uncommunicative unemotional unimpressed unmoved unprejudiced unsocial