Note 4 — Glory to Him, the Blessed Saint, the All-Enlightened one.
F. L. (Frank Lee) Woodward translation
Akataññu, knowing the Unborn, the Eternal, the state of 'Nibbāṇa', as in v.3 83:, but possibly here the context requires 'ungrateful', i.e., not bound by ties of gratitude to anybody.