The Spanish word 'ergonomía' (ergonomics) comes from combining two Ancient Greek words: 'ergon' (ἔργον) meaning 'work' or 'action', and 'nomos' (νόμος) meaning 'law' or 'custom', plus the Greek abstract noun suffix '-ia' (-ία). The elements 'nomos' and '-ia' combined to form '-nomía', meaning 'system of rules', which then joined with 'ergo-' to create a word that literally means 'the rules or laws of work' – perfectly describing the science of designing equipment and devices that fit the human body and its movements.

Some related Spanish words include 'energía' (energy), which shares a connection to the Greek concept of 'work' or 'action', and 'astronomía' (astronomy) or 'economía' (economy), which share the '-nomía' suffix pattern indicating a systematic study or set of rules.

English speakers might recognize this word's components in terms like 'ergonomic' (directly related), 'energy' (from the same Greek root 'ergon'), and words ending in '-nomy' like 'astronomy' and 'economy' (sharing the Greek 'nomos' element). The word 'ergometer', meaning a device that measures work or energy expended, also contains the 'erg-' root.