penknife

详细解释:n. 袖珍 *

英语解释：

名词 penknife:

a small pocketknife; originally used to cut quill pens

详细解释：

pen.knife

n.（名词）
A small pocketknife.
一种袖珍 *

来源：
[So called because it was originally used for cutting quill pens]
[这么称是因为从前它是用来削羽笔的]