indifference

First recorded in 1400–50; late Middle English, variant of indifferency, from Latin indifferentia; see origin at indifferent, -ence, -ency

1. Indifference, unconcern, listlessness, apathy, insensibility all imply lack of feeling. Indifference denotes an absence of feeling or interest; unconcern, an absence of concern or solicitude, a calm or cool indifference in the face of what might be expected to cause uneasiness or apprehension; listlessness, an absence of inclination or interest, a languid indifference to what is going on about one; apathy, a profound intellectual and emotional indifference suggestive of faculties either naturally sluggish or dulled by emotional disturbance, mental illness, or prolonged sickness; insensibility, an absence of capacity for feeling or of susceptibility to emotional influences.