The Vietnamese word "chủ yếu" is an adjective that means "essential" or "main." It is used to describe something that is of primary importance or the most significant part of a larger whole. You can think of it as what is most important or what you should focus on.
In more complex sentences, "chủ yếu" can be used to compare or contrast different aspects, emphasizing what is most important in a given context.
While "chủ yếu" primarily means "main" or "essential," in some contexts, it can also imply "predominantly" or "mostly," indicating that something is largely true or applicable.
In summary, "chủ yếu" is a useful adjective in Vietnamese that helps you identify what is most important in various contexts.