The Vietnamese word "chư" is an adverb that is often used as a particle to denote plurality, particularly when referring to a group of people in a respectful way. It is commonly employed in formal contexts or when addressing a group of respected individuals.
In more formal or traditional settings, "chư" can be used in religious or ceremonial contexts. For example, in Buddhist practices, one might see phrases like "chư tăng" referring to a group of monks.