The Spanish word 'advenimiento' (meaning 'advent' or 'arrival') comes from the Latin word 'advenimentum' meaning 'arrival'. This Latin word was formed by combining the prefix 'ad-' (meaning 'toward') with the verb 'venire' (meaning 'to come'). In Spanish, this developed into the verb 'advenir' ('to arrive'), and the noun 'advenimiento' was formed by adding the suffix '-miento', which creates nouns indicating the result of an action.

Some simpler Spanish words sharing this etymology include 'venir' (to come), which comes directly from Latin 'venire', and 'venida' (arrival, coming), which is a more common word for expressing arrival. The prefix 'ad-' appears in many other Spanish words like 'admitir' (to admit) and 'advertir' (to warn), always carrying the sense of movement or direction toward something.

English speakers might recognize this word's connection to 'advent' and 'adventure', which share the same Latin roots of 'ad-' (toward) and 'venire' (to come). 'Advent' particularly maintains a very similar meaning to 'advenimiento', both referring to an arrival or coming. Other related English words include 'venue' (a place where people come to), 'convene' (to come together), and 'venture' (originally meaning to risk coming forward).