名詞 pocketknife:

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

pock.et.knife

n.（名詞）
A small knife with blades or a blade that can fold into the handle when not in use.
小折刀，小刀：一種有幾個(gè)刃或一個(gè)刃的小刀，不用時(shí)可折起來(lái)收進(jìn)柄內(nèi)