#tributary

• Tributary — A flowing body of water (river or stream) that empties into a larger body of water. As an adjective and figuratively, influenced by Anglo-Saxon terminology, it describes a person, community, or lifestyle characterized by material wealth, an abundance of financial resources, and a high standard of living.
• Aldan — A major river in the Russian Federation (Eastern Siberia), serving as the largest right-bank tributary of the Lena River. Stretching over 2200 kilometers, it traverses the Aldan Highlands in Yakutia, a region rich in valuable mineral resources such as gold, coal, and mica. The term also designates the homonymous mining town located near the waterway.
• Amaradia — A watercourse in southwestern Romania, representing an important river and a left tributary of the Jiu River, which flows through the territories of Gorj and Dolj counties. The river originates in the Gorj Mountains.
• Ampoi River — The name of a river in western Romania, located within the administrative territory of Alba County, which flows for approximately 60 kilometers from its source in the northeastern Metaliferi Mountains until it empties as a right tributary into the Mureș River downstream of Alba Iulia. Its valley serves as an important geographical, historical, and economic axis, structurally separating the Metaliferi Mountains from the Trascău Mountains and housing historical towns such as Zlatna.
• Apure — A major river in southwestern Venezuela, a left tributary of the Orinoco River, flowing over eight hundred kilometers and navigable for large sections; it also represents the name of a federal state located in the plains region (Los Llanos), a structural zone renowned for cattle ranching, rich biodiversity, and massive seasonal flooding.
• Argeșel — The name of a river in southern Romania, a left tributary of the Dâmbovița River, which originates in the Făgăraș Mountains and flows through Argeș County. Structurally, the term represents a hydronymic diminutive form derived from the Argeș River, also identifying the local village of Argeșelu in the aforementioned county, a microregion historically recognized for its picturesque rural settlements and well-developed hydrographic network.
• Aruwimi — The name of a major river in the Democratic Republic of the Congo, a right-bank tributary of the Congo River. With a structural length of approximately 1,300 kilometers (including its upper course called Ituri), the river traverses dense tropical rainforest and is known in European exploration history for the expedition led by Henry Morton Stanley.
• Atbara — A river in northeast Africa, the last major right-bank tributary of the Nile before it empties into the Mediterranean Sea, originating in the Ethiopian Highlands and having a highly seasonal flow. It is also the name of a strategic city in Sudan located at the confluence of this river and the Nile, historically known as a major railway hub, a cement industrial center, and the site of a famous 1898 battle during the Mahdist War.