足球 literally means 'foot ball' — 足 (zú) means 'foot' or 'leg', and 球 (qiú) means 'ball'. Together, they refer to the sport played with a spherical ball using only the feet (and other body parts except hands), known in English as soccer (or football outside North America). It is one of the most popular team sports in China and worldwide, commonly played in schools, parks, and professional leagues.

The word 足球 is used both for the physical object (the ball itself) and the sport as a whole. In everyday conversation, it’s standard and neutral — appropriate for formal reports, casual chats, or sports commentary. Unlike some compound nouns, it’s not interchangeable with other terms like 'soccer ball' (足球本身) unless context specifies the object rather than the activity.