‘勿动’ is a concise, formal command meaning 'do not touch' or 'do not move'. It combines the prohibitive adverb 勿 (wù), which means 'do not' or 'never', with the verb 动 (dòng), meaning 'to move' or 'to touch'. Together, they form a direct, imperative phrase commonly used in signs, instructions, or warnings where physical contact must be avoided. The tone is authoritative and slightly stern, making it unsuitable for casual speech between friends.

This phrase appears frequently in contexts requiring caution—such as wildlife reserves, museum exhibits, medical settings, or laboratory environments—where touching could disturb animals, damage artifacts, or compromise safety. While grammatically equivalent to 不要动 (búyào dòng), 勿动 is more formal, literary, and compact, often preferred on official notices or placards due to its brevity and gravity.