The Vietnamese word "đăng ký" is a verb that means "to register." It is commonly used when you want to sign up for something, such as an event, a service, or an account.
You can use "đăng ký" when you are talking about the action of enrolling or signing up. It often comes with a noun that indicates what you are registering for.
Tôi muốn đăng ký tham gia lớp học này.
(I want to register for this class.)
Bạn có thể đăng ký tài khoản trên trang web.
(You can register an account on the website.)
In more formal contexts, "đăng ký" can also be used in legal or official documents, such as when registering a business or a trademark. For instance:
While "đăng ký" primarily means "to register," it can also imply making a formal request or application for something.