The Spanish word 'modesto' (meaning 'modest') comes from the Latin word 'modestus', which meant 'moderate' or 'modest'. The Latin 'modestus' was formed by combining two parts: the root 'modus' meaning 'measure' and the adjective suffix '-tus'. This combination literally created a word meaning 'having measure' or 'measured', which evolved to describe someone who shows restraint or moderation in their behavior.

Several common Spanish words share the same Latin root 'modus': 'modo' (way, manner), 'moderado' (moderate), and 'módico' (moderate, modest in price). All these words carry the core idea of measurement, restraint, or manner of doing something.

English speakers can easily connect 'modesto' to several similar English words that share the same Latin origin: 'modest', 'moderate', 'moderation', and even 'mode'. All these words preserve some aspect of the original Latin meaning of measurement or restraint. The English word 'modest' is particularly close in both meaning and form to the Spanish 'modesto', making it easy to remember.