The Spanish word 'ingresos' (meaning 'income' or 'revenue') comes from the Latin word 'ingressus' meaning 'entrance' or 'going in.' This Latin word was formed by combining two elements: the prefix 'in-' meaning 'into, within' and 'gressus' meaning 'step' or 'walk.' The evolution from the concept of 'entering' or 'going in' to 'income' makes intuitive sense, as income can be thought of as money coming in or entering one's possession.

Some related Spanish words include 'ingreso' (singular form, meaning 'entrance' or 'admission'), 'ingresar' (verb meaning 'to enter' or 'to deposit money'), and 'ingresante' (meaning 'entering student' or 'freshman'). All these words maintain a connection to the original Latin meaning of 'entering' or 'going in.'

English words related to 'ingresos' through the Latin root 'gressus' include 'ingress' (entrance), 'progress' (moving forward), 'regress' (moving backward), and 'congress' (coming together). The 'gress' element in all these words relates to stepping or walking in different ways. Another familiar word is 'aggressive,' which originally meant 'stepping toward' or 'approaching.'