Ujána: Ut – ja + anat. Movement in an upward direction is called ujána. The natural flow of a river is from the hill to the ocean, that is, downstream (bhát́i). If the flow is unnatural and reverse, i.e., if it is from the ocean to the hill, it will be called ujána. When a boat moves downstream, it sails along the flow of currents. If the wind blows in its favour, and the sail is raised, it moves very smoothly. The boatsman only has to rest holding the rudder. The oarsmen have hardly anything to do. In that situation, the song people sing in an open voice, in elongated sound, that song sung with the downstream flow, is, in Bengali, called bhát́iyáli. If the movement is from the sea to the hill, i.e., if it is upstream, the oarsmen have to make hard toil. Making a sound like hṋeiyo, hṋeiyo, they have to enhance their finger movement. At that time, it is well nigh impossible to sing in an open voice. And to sing in an elongated voice is still more impossible. This song sung when moving upstream should have been called ujániá or ujiálii. But in Bengali, this kind of song is generally called bháoyáiyá. In Bengal, the people living in areas where rivers flow uphill are called ujánii or ujániá. They are called similarly in Assam. For example, areas like Shivsagar, Tinsukia, Dibrugarh, etc. are called ujána Assam. And areas like Kamrup, Nawgong are called bhát́i Assam.