pocketknife

名词 pocketknife:

1. a knife with a blade that folds into the handle; suitable for carrying in the pocket
   同义词：pocket knife

pock.et.knife

n.（名词）
A small knife with blades or a blade that can fold into the handle when not in use.
小折刀，小刀：一种有几个刃或一个刃的小刀，不用时可折起来收进柄内