The Vietnamese word "bất tỉnh" means "unconscious" or "insensible." It is used to describe a state where a person is not aware of their surroundings and cannot respond. This can happen for various reasons, such as being seriously injured or experiencing a shock.
Bị thương nặng, nằm bất tỉnh.
(Seriously wounded, he lay unconscious.)
Nghe tin đau xót, ngã lăn ra bất tỉnh.
(On hearing the painful news, she fell down unconscious.)
While "bất tỉnh" primarily refers to being unconscious, it can also be used metaphorically to describe someone who is in a state of shock or extreme emotional distress, although this is less common.