'选手' literally combines '选' (xuǎn), meaning 'to select' or 'to choose', and '手' (shǒu), meaning 'hand' but used here as a suffix indicating a person skilled or involved in an activity — like 'a hand at something'. Together, it means a person who has been selected to compete or participate formally in a contest, competition, or performance. It’s neutral in register and widely used across sports, academic contests, talent shows, and even workplace challenges.

The term emphasizes formal participation rather than casual involvement: anyone actively competing under official rules or criteria qualifies as a 选手. It’s commonly modified by classifiers (e.g., 一名选手, 三位选手) and often appears with verbs like 参加 (to participate), 淘汰 (to eliminate), or 获奖 (to win an award). Unlike more general terms like 人 (person), 选手 always implies a competitive or evaluative context.