impermanency

/ɪmˈpɜːrmənənsi/
noun
  1. The quality of being temporary or not lasting; a less common variant of 'impermanence'.
    • The impermanency of the sandcastle was part of its charm.
    • The impermanency of the job market makes long-term planning difficult.
    • She wrote a poem about the impermanency of happiness.
Antonyms