The Vietnamese word "nắp" is a noun that means "lid" or "cover." It refers to a removable top that is used to close or cover a container, such as a pot, jar, or bottle.
Giở nắp ra - "Take off the lid."
Nắp chai - "Bottle cap."
While "nắp" primarily means "lid," it can also imply a barrier or something that limits access, much like a lid limits what can be accessed inside a container.