Step 1: Understanding the Concept:
Certain rivers in India are historically nicknamed "Sorrow" because of their tendency to cause frequent and devastating floods.
Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{The Damodar River was historically known as the 'Sorrow of Bengal' (Bengaler Dukh) because it would frequently flood large areas of the plains in West Bengal, causing immense damage to life and property.} \\ \bullet & \text{However, the construction of several dams under the Damodar Valley Corporation (DVC) has largely tamed the river and controlled the floods.} \\ \bullet & \text{The Kosi River is known as the 'Sorrow of Bihar' for similar reasons.} \\ \end{array}\]
Step 3: Final Answer:
The Damodar river is called the 'Sorrow of Bengal'.