1. In each the primitive, sometimes bestial is joined obdurately to the modern and sophisticated.

2. Synonyms for Callously include brutally, coldly, hardheartedly, harshly, heartlessly, indifferently, insensitively, obdurately, unfeelingly and carelessly

3. Callously adverb heartlessly, coldly, harshly, brutally, insensitively, obdurately, unfeelingly, soullessly, hardheartedly He is accused of Callously ill-treating his wife