导读：一：blunt的反义词是sharp，意思是锋利的、尖锐的。二：sharp通常用来形容物体的边缘或者角度，也可以用来形容人的智慧和语言，表示思维
一：blunt的反义词是sharp，意思是锋利的、尖锐的。
二：sharp通常用来形容物体的边缘或者角度，也可以用来形容人的智慧和语言，表示思维敏捷、言辞犀利。
三：1. The knife's blade is sharp and can easily cut through the meat. 这把刀的刃很锋利，可以轻易地切开肉。
2. She has a sharp mind and can solve problems quickly. 她头脑敏捷，能够迅速解决问题。
3. He made a sharp remark that offended everyone in the room. 他说了一句尖锐的话，冒犯了房间里的每个人。
4. The sharp turn in the road caught the driver off guard. 道路上突然出现的急转弯让司机措手不及。
5. The teacher's sharp criticism of the student's work motivated him to improve. 老师对学生作品的尖锐批评激励他改进。
四：同义词为keen，用法类似于sharp。：
1. He has a keen sense of humor and always makes us laugh. 他有一种敏锐的幽默感，总是让我们笑。
2. The journalist has a keen eye for details and never misses any important information. 这位记者对细节有敏锐的洞察力，从不错过任何重要信息。
3. The detective's keen observation skills helped him solve the case. 这位侦探敏锐的观察力帮助他解决了这个案件。
4. She has a keen interest in art and spends most of her free time painting. 她对艺术有浓厚的兴趣，大部分空闲时间都用来画画。
5. The company's keen business strategy has led to its success in the market. 公司敏锐的商业策略使其在市场上取得了成功。