Explanation:

 The river Brahmaputra was earlier known as Dilao or Laoti. In Bodo, the term Dilao or Laoti means long river i.e. Di or Ti= river and Lao= long. The complete meaning is the long river. The Brahmaputra River is the longest river in Assam. Ahom Buranji also the river Brahmaputra is very frequently referred to as Tilao. In many of the instances like in the manuscript 36 f. No. 4(a), Department of Historical and Antiquarian studies, Guahati, Assam, the river is also referred to as Luit or Louhita.