callous 冷酷，无同情心的，麻木不仁

罗素曾经指出中国人的性格中有三个最大的缺点：贪婪、懦弱和缺乏同情心（an eminent Chinese writer pressed me to say what I considered the chief defects of the Chinese. With some reluctance, I mentioned three: avarice, cowardice and callousness.）