Pronunciation: [wˈɔːtəz mˈa͡ʊθ] (IPA) 
The correct spelling of the phrase "waters mouth" is "water's mouth". The apostrophe indicates that the mouth belongs to the water. In IPA phonetic transcription, the word is spelled /ˈwɔːtəz maʊθ/. The first syllable is pronounced with an open "o" sound, while the second syllable has a "ow" diphthong. The "th" at the end is pronounced as a voiced dental fricative, similar to the "th" in "this".
Waters mouth refers to the point where a body of water, such as a river or stream, meets a larger body of water, such as a lake or ocean. This term is commonly used to describe the geographical location where a river or stream empties into another body of water, forming a natural estuary or delta.
At the water's mouth, the water flow tends to slow down due to the increase in volume and the change in water level. This often results in the deposition of sediment and the formation of river deltas, which are landforms made up of sediment deposited at the mouth of a river. River deltas are known for their fertile soil and are often agriculturally productive areas due to the deposition of silt and sediment carried by the river.
The water's mouth is also a significant ecological site, as it often supports diverse habitats and provides nurseries for various aquatic species. The mixing of freshwater and saltwater in estuaries created at the water's mouth results in a unique ecosystem that supports a wide range of plants, fish, and other marine organisms.
The term "water's mouth" can also be used figuratively to describe the opening or entrance of a waterway, such as a narrow channel or harbor, leading into a larger body of water. In this sense, it refers to the location where boating, shipping, or ferry operations can access a larger water body.
The word "waters mouth" is composed of two separate words: "water" and "mouth".
The word "water" dates back to Old English, where it was spelled "wæter". This Old English term can be traced back to the Proto-Germanic word "watar", which has ancient roots in the Proto-Indo-European (PIE) language. The PIE root for "water" is "*wódr̥", from which several Indo-European languages derive their own variations of the word.
The word "mouth" also originates from Old English, spelled as "muþ". It is derived from the Proto-Germanic word "munthaz", which can be traced back to the PIE root "*men-", meaning "to think" or "recall". The concept of "mouth" likely stems from the idea that speaking and thinking are closely connected.
