The Spanish word 'epistaxis', meaning 'nosebleed', comes from Ancient Greek through Latin. It was formed from three Greek elements: 'epi-' meaning 'upon' or 'over', 'stazein' meaning 'to drip', and the suffix '-sis' which forms nouns indicating an action or process. These combined to form the Greek word 'ἐπίσταξις' (epistaxis), literally describing the action of 'dripping down/over'. This term was borrowed into Latin as 'epistaxis' and subsequently passed into Spanish with the same form and meaning.

While 'epistaxis' is a medical term in Spanish, it's worth noting that there aren't many common Spanish words directly related to its Greek components. However, the prefix 'epi-' appears in other Spanish medical and scientific terms like 'epidermis' (outer layer of skin) and 'epígrafe' (epigraph).

English speakers might recognize the prefix 'epi-' from many familiar words that share this Greek origin, such as 'epidemic' (spreading over people), 'epiphany' (appearing over), and 'epitome' (cut upon). The '-staxis' part, from Greek 'stazein' (to drip), appears in other medical terms like 'hemostasis' (the stopping of blood flow). The suffix '-sis' is very common in English medical and scientific terms like 'analysis', 'synthesis', and 'thesis'.