The Vietnamese word "não" is a noun that primarily means "brain" or "cerebrum." It refers to the organ in your head that is responsible for thinking, feeling, and controlling your body movements.
In advanced contexts, "não" can also be used metaphorically to refer to intellect or mental capacity. When someone says, "Tôi dùng não của mình," it means "I am using my brain" in the sense of thinking critically or solving a problem.
While "não" primarily means "brain," it can sometimes be used in idiomatic expressions or phrases that convey different meanings related to thinking or mental capacity.