perdurably

/pərˈdʊrəbli/
adverb
  1. In a way that lasts for a very long time or forever; enduringly.
    • The monument was built perdurably, with materials chosen to resist decay.
    • The artist's fame has perdurably remained, long after her death.
    • Their love was perdurably strong, never fading even in hard times.
Antonyms
What does "perdurably" mean? | whatsthatwordmean | whatsthatwordmean