Deltas are a type of river delta. A delta is a large area of land that is surrounded by water. Deltas are usually found in coastal areas.
Unsurprising is something that is not very surprising. When you say that something is unsurprising, you mean that you expected it to happen.
When something sags, it droops or hangs down. The fabric on the shirt sagged after the weight was taken off of it.
To rot is to decay and to turn into something decomposable. When something rots, it starts to break down and lose its nutrients.
Overgrow is to grow too much. When you overgrow a plant, it becomes too big and difficult to control.
To plummet is to fall quickly and dramatically. When the stock market plunges, the prices of the stocks go down very quickly.
To say that something is a dooms is to say that it is a very bad thing. This word is often used to describe the situation in which the world is going to end.
Mosquitoes are small, flying insects that live in warm climates. They are known for the diseases that they can spread to humans.
Unyielding is adjective that describes something that is not willing to change or to accept a compromise. The weather is unyielding, and it will not rain until the weatherman says that it's okay to do so.