What is "sunyatphaa"

Sunyatphaa or Udayaditya Singha was the king of Ahom Kingdom from 1670 CE to 1672 CE. After his elder brother Swargadeo Chakradhwaj Singha died in the middle of Ahom-Mughal war, Udayaditya Singha succeeded to the throne. His reign witnessed the end of Ahom-Mughal war, which started during the reign of Chakradhwaj Singha, when the Mughal army led by Rajput prince, Raja Ram Singh I of Amber, was decisively defeated by the Ahom forces led by Ahom commander Lachit Borphukan in the Battle of Saraighat. The later part of his reign was characterized by the failure of military expedition against the Dafala tribes and the influence of Paramananda Sannyasi, a saintly figure from Brindaban, over Udayaditya Singha. Udayaditya’s over exerted devotion towards Paramananda Sanyasi, aroused dissatisfaction among the nobles, which ultimately caused his deposition and execution. His reign was followed by a series of political anarchy and internal disturbances in the Ahom kingdom which continued till the accession of Gadadhar Singha in 1681 CE.