The Spanish word 'estomatólogo' (meaning 'stomatologist' or 'dental specialist') comes from combining two Ancient Greek elements with a Spanish suffix. The first part comes from Greek 'στόμα' (stoma) meaning 'mouth', and the second from Greek 'λόγος' (logos) meaning 'study' or 'discourse'. These were combined with the Spanish nominal suffix '-o' to create a word meaning 'one who studies or specializes in matters of the mouth'.

This follows a common pattern in scientific and medical terminology where Greek roots are combined to create technical terms. The transformation from the Greek elements to the Spanish word involved adapting the spelling and pronunciation to Spanish patterns, with 'stoma' becoming 'estoma-' (adding an initial 'e-' which is common in Spanish adaptations of words beginning with 's' + consonant) and 'logos' becoming '-logo'.

Some related simpler Spanish words include 'estoma' (meaning a small pore or opening in biology) and 'boca' (though from a different root, it's useful to know this is the common word for 'mouth'). The word 'lógica' (logic) shares the same Greek root 'logos' as the second part of 'estomatólogo'.

English speakers might recognize parts of this word from medical and scientific terms like 'stoma' (a surgical opening), 'stomal' (relating to the mouth), and words ending in '-logy' like 'biology', 'psychology', and 'technology' - all of which contain the same Greek root 'logos' meaning 'study of'. The English word 'stomatology' is a direct parallel to the Spanish 'estomatólogo', though it's less commonly used in English-speaking countries where 'dentistry' is the more common term.