The word **无须** (wúxū) is a compound formed by combining the negation **无** (wú), meaning "without" or "to lack," with the verb **须** (xū), which means "must" or "need to." Literally, it translates to "without needing to," and it functions as a concise adverb meaning "there is no need to" or "it is unnecessary to." It is commonly used in modern Mandarin to express that an action is not required, as in **无须担心** (wúxū dānxīn), meaning "there's no need to worry."