deciduous Read more about deciduous (noun) - a plant, especially a tree, that loses its leaves in the winter
dam Read more about dam (noun) - a large wall built across a river to change the natural flow of water and make a deep lake form behind the wall
cypress knees Read more about cypress knees (noun) - a distinctive structure forming above the roots of a cypress tree of any of various species of the subfamily Taxodioideae. Their function is unknown, but they are generally seen on trees growing in swamps.
culture Read more about culture (noun) - the way of life of a group of people, including their behaviors, beliefs, values, customs, and symbols
cultural diffusion Read more about cultural diffusion (noun) - the spread of cultural elements from one culture to another