nonending
1 of 2adjective
non·end·ing ˌnän-ˈen-diŋ 
: never ending : endless, unending
a seemingly nonending task
nonending
2 of 2noun
: an incomplete or inadequate ending
… made her prime-time debut on Girlfriends, which ran for nearly nine seasons before an unceremonious nonending in 2008.
Regina R. Robertson
Regina R. RobertsonOnce, people probably broke up maturely, in conversations inarguably final in tone. Now we have ragged nonendings. Phoebe Luckhurst
Phoebe Luckhurst
Example Sentences
Recent Examples on the Web Mike Shropshire, Slate Magazine, 5 Apr. 2017
Noun
Meanwhile, those of us in Dallas are left to contemplate the ultimate nonending to a flamboyant and perpetually entertaining career. Mike Shropshire, Slate Magazine, 5 Apr. 2017 Word History
First Known Use
Adjective
1834, in the meaning defined above
Noun
circa 1886, in the meaning defined above