The Spanish verb 'peregrinar' (meaning 'to travel' or 'to make a pilgrimage') comes from the Latin verb 'peregrinari' meaning 'to travel abroad'. This Latin verb was derived from 'peregrinus' meaning 'foreigner' or 'traveler', which was formed by combining two Latin elements: the prefix 'per-' meaning 'through' and 'ager' meaning 'field' or 'land'. So etymologically, a 'peregrinus' was someone who went through or across fields/lands, essentially describing someone who traveled away from their home territory.

Some related Spanish words include 'peregrino' (pilgrim), 'peregrinación' (pilgrimage), and 'peregrinar' as a noun (pilgrimage). All these words share the same root and maintain the connection to the concept of traveling, particularly in a religious or spiritual context.

The English word 'pilgrim' is actually related to 'peregrinar', as it also comes from Latin 'peregrinus' through Old French 'pelegrin'. Another related English word is 'peregrinate' (to travel or wander around), though this is rather formal and less commonly used. The word 'peregrine', as in 'peregrine falcon', also shares this etymology - it was named for its wandering/migratory nature.