rapier
/ˈreɪpɪə(r)/noun
1- a thin, light sharp-pointed sword used for thrusting（击剑用的）轻剑。
1.1
- as modifier(especially of speech or intelligence) quick and incisive（尤指言辞、智力）机敏的; 深刻的：
rapier wit.
机敏的智慧。
词源
early 16th cent.: from French rapière, from rape 'rasp, grater' (because the perforated hilt resembles a rasp or grater).