一：冷酷的是指冷漠、无情、无感情的意思。英文为"cold-blooded"。

二：读音为[kəʊld ˈblʌdɪd]。

三：冷酷可以用作形容词，用来形容人或者行为。也可以用作名词，表示冷漠的态度或者无情的行为。

四：1. His cold-blooded attitude towards his family made him very unpopular. (他对家人的冷漠态度让他非常不受欢迎。)

2. The killer showed no emotion during the trial, he was truly cold-blooded. (杀手在审判中没有表现出任何情绪，他真的很冷酷。)

3. The boss's decision to lay off half of the employees was seen as a cold-blooded move. (老板裁员一半员工的决定被视为一种冷酷的举动。)

4. She couldn't believe her best friend could be so cold-blooded and betray her like that. (她无法相信自己最好的朋友会如此冷酷地背叛她。)

5. The dictator's regime was known for its cold-blooded and ruthless actions towards its citizens. (者的政权以对公民冷酷无情和残忍行径而闻名。)

五：同义词包括heartless、unfeeling、unsympathetic、callous、indifferent等。用法类似，但有些微小的差别。，heartless更强调无情和残忍，unfeeling更强调缺乏感情和同情心，unsympathetic更强调缺乏同情心和理解力，callous更强调冷漠和无感情，indifferent更强调缺乏兴趣和关注。

六：编辑总结：冷酷一词是指人或行为缺乏感情、无情冷漠的状态。它可以用来形容人或者行为，并且可以作为名词使用。其同义词包括heartless、unfeeling、unsympathetic、callous、indifferent等。在写作中要注意使用场景和语境来选择合适的表达方式，避免重复使用同一个词语。