keenness 

英汉解释

n. 敏锐；锐利

同义词

n. acuity，acuteness，eagerness，sharpness

反义词

n.   bluntness，dullness

参考例句

1. The razor-blade is proud of its keenness when is sneers at the sun.
剃刀的刀口以它的锋利自傲，当它向太阳嘲笑时。
2. The scabbard is content to be dull when it protects the keenness of the word.
剑鞘保护剑的锋利，自己却满足于它自己的迟钝。——泰戈尔。
3. St John approved of my keenness to work, and promised to find me some paid employment.
圣约翰赞同我对工作的迫切要求，答应帮我找份挣钱的工作。

英英解释

n.
  1. a quick and penetrating intelligence
  2. a positive feeling of wanting to push ahead with something
  3. thinness of edge or fineness of point

网络释义

keenness
锋利; 敏锐; 锐敏度; 热心;
acumination keenness sharpness trenchancy
锐利;
acuity edge keenness
尖锐;
keenness rat hole
方钻杆用鼠洞;
have a thin skin keenness sensitivity susceptivity tenderness
敏感;