Fish is a word in the English language that comes from Old English "fisc," which itself comes from the Proto-Germanic word "fiskaz," meaning "fish." The word "fish" has been in use in the English language for many centuries and is used to refer to a wide variety of aquatic animals, including those with fins, gills, and a backbone, that live in water and are often caught for food. Fish are an important part of many cultures and cuisines around the world and play a vital role in the ecology of many aquatic environments.