The Spanish word 'agronomía' (agronomy) comes from combining two Ancient Greek words: 'agros' meaning 'field' or 'farmland', and 'nomos' meaning 'law' or 'custom'. These elements first combined in Ancient Greek to form 'agronomos', which referred to a field inspector.

In Spanish, this developed into the word 'agrónomo' (agronomist), and then with the addition of the suffix '-ía' (which forms abstract nouns), it became 'agronomía', referring to the science and study of agriculture and farming.

Several common Spanish words share the 'agro-' root, including 'agricultura' (agriculture), 'agrícola' (agricultural), and 'agropecuario' (agricultural and livestock-related). All these words maintain the connection to farming and agricultural activities from the original Greek 'agros'.

English speakers might recognize this word's relationship to 'agronomy' and 'agronomist', which share the same Greek origins. Other related English words include 'agriculture', 'agrarian', and 'agribusiness'. The 'agr-' beginning in all these words comes from the same Greek root meaning 'field' or 'farmland'.