The Spanish word 'ciclismo' (meaning 'cycling') comes from the French word 'cyclisme', which was formed by combining the Latin word 'cyclus' (meaning 'circle') with the French suffix '-isme' (denoting an activity or practice). The Latin 'cyclus' itself was borrowed from the Ancient Greek word 'kyklos' (κύκλος), which meant 'circle' or 'wheel'.

This etymology makes intuitive sense since cycling involves the circular motion of wheels, and the sport/activity got its name from this fundamental circular movement.

Several common Spanish words share this same Greek root 'kyklos'. For example: 'ciclo' (cycle), 'bicicleta' (bicycle), 'reciclar' (to recycle), and 'ciclón' (cyclone). All these words contain the idea of something circular or moving in a circular pattern.

Many English words are related to 'ciclismo' through the same Greek root 'kyklos'. The most obvious ones are 'cycle', 'cycling', and 'bicycle'. Other related words include 'cyclone' (referring to a circular storm system), 'encyclopedia' (literally meaning 'circle of learning'), and 'recycle' (to put something back into a cycle). The connection to circular motion or circular patterns is present in all these words.