immitigably

/ɪˈmɪtɪɡəbli/
adverb
  1. In a way that cannot be made less severe, intense, or painful; unrelentingly.
    • She worked immitigably to finish the project, despite every obstacle.
    • The drought continued immitigably, destroying crops across the region.
    • The storm raged immitigably through the night, leaving destruction in its path.