'lagoon' originates from Italian, specifically the word 'laguna,' where 'laguna' meant 'pond' or 'lake.'

'laguna' transformed into the French word 'lagune,' and eventually became the modern English word 'lagoon' through Middle English.

Initially, it meant 'pond' or 'lake,' but over time it evolved into its current meaning of 'a shallow body of water separated from a larger sea.'