The term you are looking for is landlocked.
Lake
An island is a body of land completely surrounded by water.
A country that is completely surrounded by other countries is described as landlocked.
pond
Island?
a fresh water pond
A piece of land that's surrounded by water on three sides is usually called a peninsula.
An area of land completely surrounded by water is called an island.
An Island
Yes. Hawaii is an Island which by definition is an area of land completely surrounded by water
a wonderful island.
a fresh water pond