‘护照’ (hù zhào) is a government-issued identity document that proves a person’s nationality and allows them to travel internationally. The first character, ‘护’ (hù), means ‘to protect’ or ‘to safeguard’, reflecting the document’s role in protecting the holder’s legal status abroad. The second character, ‘照’ (zhào), literally means ‘photo’ or ‘image’, but here it functions as a suffix meaning ‘certificate’ or ‘official document’ — similar to how it appears in words like ‘身份证’ (ID card) or ‘毕业证’ (diploma). Together, ‘护照’ conveys the idea of an official, protective document containing the bearer’s photo and personal information.

This word is used exclusively for international travel documents issued by national authorities. It is formal and neutral in register, appearing in official contexts such as border control, visa applications, airline check-in, and immigration procedures. Unlike everyday ID cards, a passport is required only when crossing national borders and carries significant legal weight under international law.