游泳 means 'swimming'—both as a physical activity and as a sport. The character 游 (yóu) originally meant 'to swim' or 'to move freely in water', and also carries broader meanings like 'to travel' or 'to wander'. The character 泳 (yǒng) specifically denotes the act of swimming, emphasizing motion through water using arms and legs. Together, 游泳 functions as a compound noun and verb, commonly used in contexts related to fitness, recreation, safety, and competitive sports.

This word is neutral in register and appears frequently in daily conversation, health education, school curricula, and public signage (e.g., '游泳池' — swimming pool). Unlike some verbs that require aspect particles, 游泳 can be used directly with time words (e.g., 每天游泳), and it does not take the directional complements that many motion verbs do. It’s often paired with verbs like 喜欢, 学会, or 练习 to express preference, acquisition, or practice.