What is "tuku'aho"

Tuku’aho was the 14th Tu’I Kanokupolu of Tonga, reigning approximately from 1793 to 1799. He was considered the “strong man” of the Tupou family despite coming from a lower lineage, and he used his power to depose the 12th Tu’I Kanokupolu, Tupoumoheofo, who was of the higher line. Tuku’aho placed instilled his own father, Mumui, as the 13th Tu’I Kanokupolu and then took the title for himself upon Mumui’s death. Tuku’aho reigned Tonga as a tyrant, for which he was assassinated by a team of high chiefs. His death sparked a civil war that lasted for nearly a half century.