The Vietnamese word "mím" is a verb that means to tighten or press together, particularly when referring to lips. When someone "mím" their lips, it often conveys a sense of holding back emotions, being serious, or preparing to say something important.
While "mím" primarily relates to lips, it can also imply tightening in a broader context, such as tightening one's grip or holding something securely, though this usage is less common.