rider/'raɪdər $ -dər/

n. a person who rides a horse, bike, etc.

n. [C] 骑马（或自行车等）者；骑手：The rider was thrown off the horse while jumping across a stream. 在越过小溪时，骑手被摔下了马背。

◇a motorcycle rider 摩托车手

构词ride + -er