The Spanish word 'recurso' (meaning 'resource' or 'recourse') comes from the Latin word 'recursus', which meant 'return' or 'recourse'. The Latin 'recursus' itself was formed by combining two elements: the prefix 're-' meaning 'back' or 'again', and the verb 'currere' meaning 'to run'. So etymologically, 'recurso' carries the notion of 'running back' or 'returning to something repeatedly', which evolved to mean a resource that one can return to or rely upon, or a recourse - a path to turn back to when needed.

Several common Spanish words share roots with 'recurso'. The verb 'correr' (to run) comes from the same Latin 'currere'. Other related words include 'curso' (course), 'recorrer' (to travel through, traverse), and 'ocurrir' (to occur, happen). All these words maintain some connection to the original idea of movement or running, though each has developed its own specific meaning.

English speakers can connect 'recurso' to several familiar English words. 'Recourse' is the most direct cognate, sharing both etymology and similar meaning. Other related English words include 'course', 'current', 'cursor', and 'recur' - all derived from Latin 'currere'. The word 'resource' is also related, though it took a slightly different path through Old French. Understanding these connections can help remember that a 'recurso' is something you can run back to or rely upon when needed.