The Vietnamese word "thủy tinh" means "glass" in English. It is a noun used to refer to a hard, transparent material that is commonly used to make windows, bottles, and many other objects.
Cái ly này làm bằng thủy tinh.
(This cup is made of glass.)
Tôi cần một cái bình thủy tinh để đựng nước.
(I need a glass jar to hold water.)
While "thủy tinh" primarily means "glass," it can also refer to "mercury" in some contexts, particularly in scientific discussions or when talking about certain types of thermometers. However, this usage is less common.