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n.
1.笔，钢笔 2.圈，围栏，畜栏
vt.
1.写 2.把...关/圈起来

pen and ink
钢笔和墨水
a sheep pen
羊圈
put pen to paper
写，动笔
pen sb./sth. in/up
把...关起来，把...圈起来

a new book from the pen of Martin Amis
马丁.埃米斯写的新书
He penned a letter to the local paper.
他给当地报纸写了一封信。
At clipping time sheep need to be penned.
在剪羊毛时，需要把羊圈起来。
The whole family were penned up in one room for a month.
全家人被关在一间屋子里达一个月之久。

ballpoint pen felt-tip pen fountain pen