The Spanish word 'gerundio' comes from the Latin word 'gerundium', which referred to a verbal noun form (what we call a gerund in grammar). The Latin 'gerundium' itself was derived from the verb 'gerere', meaning 'to carry out' or 'to perform'. This etymology makes sense because gerunds in Spanish (and English) represent the ongoing performance or carrying out of an action, like the '-ing' form in English (e.g., 'running', 'walking').

While 'gerundio' is primarily a grammatical term, there are some related Spanish words that come from the same Latin root 'gerere', such as 'gestión' (management), 'gesto' (gesture), and 'gestar' (to develop or generate). All these words carry the underlying notion of carrying out or performing an action.

English speakers might find it helpful to know that the English word 'gerund' is directly related to Spanish 'gerundio', as both come from Latin 'gerundium'. Other English words from the same Latin root 'gerere' include 'gesture', 'gestation', 'digest', and 'suggest', all of which involve some form of carrying out or performing an action.