The Spanish word 'marido' (meaning 'husband') comes directly from the Latin word 'maritus', which also meant 'husband' or 'married'. This is a straightforward inheritance where both the form and meaning remained quite stable from Latin to Spanish, with just a typical sound change from 't' to 'd' that occurred in many Spanish words derived from Latin.

Some related Spanish words include 'matrimonio' (marriage), 'marital' (marital), and 'maridar' (to marry or match). All these words share the same Latin root relating to marriage and partnerships.

English speakers might recognize the connection to words like 'marital' (relating to marriage), 'matrimony', and 'marry'. These English words also derive from the same Latin root 'maritus'. While English took these words from Latin through French influence after the Norman Conquest, Spanish inherited its word 'marido' directly from Latin.