Pronunciation: [ɹˈɪvə bˈɒtəm] (IPA) 
The correct spelling of "river bottom" is /ˈrɪvər ˈbɒtəm/. The word "river" is spelled with the letter "r" followed by the "i-v-e-r" sound, which is represented as /ˈrɪvər/ in IPA. The word "bottom" is spelled as it sounds, with the "b" sound followed by the "ot-tom" sound, which is represented as /ˈbɒtəm/ in IPA. When combined, the two words form a compound word representing the area at the bottom of a river.
River Bottom:
Noun
1. The bed or floor of a river or stream, consisting of the sediment and other materials that have been deposited over time by the flowing water. It is typically characterized by a variety of organic and inorganic matter, such as sand, silt, clay, rocks, and debris, and varies in texture and composition depending on the geological and environmental factors of the specific location.
2. The lowermost part of a river system, usually the deepest area, where the water flow is slow and the accumulation of sediments is more prevalent. This region is often characterized by a flat or gently sloping terrain, and its landscape can be diverse, including pools, riffles, and bars. River bottoms serve as vital habitats for a wide range of aquatic and terrestrial organisms, supporting a rich biodiversity. They provide important feeding and breeding grounds for an array of aquatic plants and animals, including fish, amphibians, mollusks, and insects.
3. In a figurative sense, "river bottom" can also refer to an individual or group of people residing or having a lifestyle associated with the low-lying regions near a river. This usage is often found in the context of rural communities living in close proximity to river systems and engaging in activities such as fishing, agriculture, or traditional riverboat transportation.
The word "river bottom" is a compound noun formed by combining the words "river" and "bottom". The etymology of these individual words is as follows:
1. River: The word "river" originated from the Middle English word "rivere", which can be traced back to the Old French word "riviere" and the Latin word "riparius", meaning "of a riverbank". It ultimately roots from the Latin word "ripa", meaning "bank" or "shore".
2. Bottom: The word "bottom" has its roots in the Old English word "botm" or "bodan", which refers to the lowest part or deepest point of something. The term can also be traced back to the Proto-Germanic word "buzam", meaning "lower part".
When combined, "river bottom" refers to the lowest part of a river or the land at the base of a river.
