never-ending
1. [ adjective ] uninterrupted in time and indefinitely long continuing
Synonyms: ceaseless perpetual incessant unceasing unremitting constant
Examples:

"the ceaseless thunder of surf" "in constant pain" "the incessant noise of the city" "the never-ending search for happiness" "the perpetual struggle to maintain standards in a democracy"

Related terms: continuous
Similar spelling:   nevermore
  never_mind
  never-never