The Spanish verb 'cambiar' (meaning 'to change' or 'to exchange') traces its roots back to the Gaulish word 'cambion', meaning 'exchange'. This Gaulish term was borrowed into Latin as 'cambiare', meaning 'to exchange', and then evolved into the modern Spanish word. The basic meaning of exchange or transformation has remained remarkably consistent throughout its evolution from Celtic languages through Latin and into modern Spanish.

Some common related Spanish words include 'cambio' (change, as in money exchange or gear shift), 'cambiante' (changing/changeable), and 'intercambiar' (to interchange/exchange). All these words share the same root and basic concept of change or exchange.

While English 'change' is not directly related to 'cambiar' (it comes from a different Latin root), English has borrowed some related words through French, such as 'exchange' and 'interchange', which contain the same ancient root. The word 'cambio' is also sometimes used in English in the context of currency exchange.