The Spanish word 'fumigación' (fumigation) comes from Latin 'fumigatio', which was derived from the verb 'fumigare' meaning 'to smoke' or 'to fumigate'. The Latin 'fumigare' itself was formed by combining two elements: 'fumus' meaning 'smoke' and 'agere' meaning 'to do' or 'to drive'. In Spanish, the Latin 'fumigare' evolved into the verb 'fumigar', and when combined with the action noun suffix '-ción', it formed 'fumigación', describing the act of fumigating or treating something with smoke or fumes.

Some related Spanish words include 'humo' (smoke), which comes from the same Latin root 'fumus', and 'fumar' (to smoke), which is also derived from this Latin base. These connections make it easier to remember that 'fumigación' relates to treating something with smoke or fumes.

English speakers might recognize the connection to words like 'fume', 'fumigation', and 'fumigate', which share the same Latin ancestry. The word 'perfume' is also related, originally meaning 'through smoke' as early perfumes were made by burning fragrant materials. These connections help illustrate how the concept of smoke and fumes links these related words across both languages.