'Dài kǒuzhào' literally means 'to wear a mouth-covering cover' — 'dài' means 'to wear (on the head, face, or body)', 'kǒu' means 'mouth', and 'zhào' means 'cover' or 'hood'. Together, they form a common verb phrase meaning 'to wear a face mask'. This term is widely used in daily life, especially during flu season, air pollution episodes, or public health emergencies like pandemics.

The phrase functions as a verb and typically appears after a subject and before location or purpose phrases. It’s often used in instructions, public announcements, or personal habits — for example, 'Please wear a face mask when entering hospitals' or 'She always wears a face mask on crowded subways.' Unlike some verbs, it doesn’t require an object marker (e.g., 'le' or 'guo') unless indicating completed or experiential aspect, but the bare form suffices for general statements or commands.