IPA: /ləˈɡuːn/
KK: /lɑːˈɡuːn/
A shallow body of water separated from a larger body of water by a barrier, such as a sandbank or coral reef.
The tropical island is surrounded by a beautiful lagune that attracts many tourists.
Lagune → The word 'lagune' comes from the Italian 'laguna', which is derived from Latin 'lacuna', meaning a pool or pond. It refers to a shallow body of water separated from a larger body of water, often found along coastlines.
Think of a 'pool' ('lacuna') of water that is 'separated' from the ocean — that's what a lagune is.