The Vietnamese word "kín mít" means "very tight" in English. It is often used to describe something that is securely closed or sealed, so that no air or light can get in or out.
You can use "kín mít" when you want to express that something is completely closed or tightly secured. It can be used for physical objects, like doors or windows, as well as in a metaphorical sense for situations or information.
In a more advanced context, "kín mít" can be used to describe situations where information is kept confidential or secretive. For example, you might say, "Thông tin này được giữ kín mít," meaning "This information is kept very secret."
While "kín mít" primarily means "very tight," in certain contexts, it can also imply being discreet or secretive.